https://osunpk.com/2026/04/03/mechanisms-of-soil-fertility-looking-at-biologicals-and-moa/https://osunpk.com/wp-content/uploads/2026/04/bio_blog2.jpg.pngBio_Blog2.jpg2026-04-03T18:23:58+00:00monthlyhttps://osunpk.com/2026/04/01/the-mechanics-of-soil-fertility-use-of-sugar-in-field-crops/https://osunpk.com/wp-content/uploads/2026/04/sugar.jpgsugarhttps://osunpk.com/wp-content/uploads/2026/04/image.pngimage2026-04-01T17:59:56+00:00monthlyhttps://osunpk.com/2026/03/31/mechanics-of-soil-fertility-understanding-humic-and-fulvic-acids/2026-03-31T13:56:15+00:00monthlyhttps://osunpk.com/2026/03/26/monitoring-for-cotton-jassid-a-potential-new-threat-to-oklahoma-cotton/https://osunpk.com/wp-content/uploads/2026/03/image-2.pngimagehttps://osunpk.com/wp-content/uploads/2026/03/image-3.pngimagehttps://osunpk.com/wp-content/uploads/2026/03/image-5.pngimagehttps://osunpk.com/wp-content/uploads/2026/03/image-4.pngimage2026-03-26T17:56:45+00:00monthlyhttps://osunpk.com/2026/03/25/small-pest-big-problems-wheat-curl-mites-and-wheat-streak-mosaic-virus-detected-in-oklahoma/https://osunpk.com/wp-content/uploads/2026/03/image-1.pngimagehttps://osunpk.com/wp-content/uploads/2026/03/image.pngimagehttps://osunpk.com/wp-content/uploads/2026/03/image-2.jpegimagehttps://osunpk.com/wp-content/uploads/2026/03/image-3.jpegimage2026-03-25T21:51:34+00:00monthlyhttps://osunpk.com/2026/03/23/brown-wheat-mite-activity-in-north-central-oklahoma/https://osunpk.com/wp-content/uploads/2026/03/image.jpegimagehttps://osunpk.com/wp-content/uploads/2026/03/image-1.jpegimagehttps://osunpk.com/wp-content/uploads/2026/03/image-1-1.jpegimage2026-03-23T22:34:01+00:00monthlyhttps://osunpk.com/2026/03/18/corn-hybrids-yield-response-to-limited-well-capacities-in-the-central-high-plains/https://osunpk.com/wp-content/uploads/2026/03/figure-3.jpgFigure 3https://osunpk.com/wp-content/uploads/2026/03/figure-2.jpgFigure 2https://osunpk.com/wp-content/uploads/2026/03/figure-1.jpgFigure 12026-03-18T15:11:04+00:00monthlyhttps://osunpk.com/2026/03/16/check-your-wheat-greenbugs-reported-in-central-oklahoma/https://osunpk.com/wp-content/uploads/2026/03/table-2.pngTable 2https://osunpk.com/wp-content/uploads/2026/03/table-1.pngTable 1https://osunpk.com/wp-content/uploads/2026/03/figure-4.pngFigure 4https://osunpk.com/wp-content/uploads/2026/03/figure-3.pngFigure 3https://osunpk.com/wp-content/uploads/2026/03/figure-2.pngFigure 2https://osunpk.com/wp-content/uploads/2026/03/figure-1.pngFigure 12026-03-16T17:39:11+00:00monthlyhttps://osunpk.com/2026/01/06/thoughts-from-an-agronomist-1-management-of-the-primordia/https://osunpk.com/wp-content/uploads/2026/01/image.pngimage2026-01-06T15:23:45+00:00monthlyhttps://osunpk.com/2025/12/08/one-well-timed-shot-rethinking-split-nitrogen-applications-in-wheat-production/2025-12-08T21:20:26+00:00monthlyhttps://osunpk.com/2025/09/03/using-soil-moisture-trend-values-from-moisture-sensors-for-irrigation-decisions/https://osunpk.com/wp-content/uploads/2025/09/fig1.jpgFig1https://osunpk.com/wp-content/uploads/2025/09/image.jpgimagehttps://osunpk.com/wp-content/uploads/2025/09/image-1.pngimagehttps://osunpk.com/wp-content/uploads/2025/09/image-2.pngimagehttps://osunpk.com/wp-content/uploads/2025/09/image.pngimage2025-09-03T20:27:30+00:00monthlyhttps://osunpk.com/2025/09/02/cotton-disease-update-reniform-nematode-08-25-2025/https://osunpk.com/wp-content/uploads/2025/09/figure-3.jpgFigure 3https://osunpk.com/wp-content/uploads/2025/09/figure-2.jpgFigure 2https://osunpk.com/wp-content/uploads/2025/09/picture1.jpgPicture12025-09-02T15:13:24+00:00monthlyhttps://osunpk.com/2025/08/29/what-ok-cotton-growers-should-know-about-the-two-spotted-cotton-leafhopper-aka-cotton-jassid/https://osunpk.com/wp-content/uploads/2025/08/image-1.jpegimagehttps://osunpk.com/wp-content/uploads/2025/08/image.jpegimagehttps://osunpk.com/wp-content/uploads/2025/08/image-2.jpegimagehttps://osunpk.com/wp-content/uploads/2025/08/image-3.jpegimagehttps://osunpk.com/wp-content/uploads/2025/08/image.pngimage2025-08-29T21:36:54+00:00monthlyhttps://osunpk.com/2025/07/11/toto-ive-a-feeling-were-not-in-kansas-anymore-double-cropping-orange-edition/https://osunpk.com/wp-content/uploads/2025/07/dc-corn.pngDC Corn2025-07-11T17:06:15+00:00monthlyhttps://osunpk.com/2025/07/10/army-worms-are-marching/https://osunpk.com/wp-content/uploads/2025/07/picture5.jpgPicture5https://osunpk.com/wp-content/uploads/2025/07/picture4.jpgPicture4https://osunpk.com/wp-content/uploads/2025/07/picture3.jpgPicture3https://osunpk.com/wp-content/uploads/2025/07/picture2.jpgPicture2https://osunpk.com/wp-content/uploads/2025/07/picture1.jpgPicture12025-07-10T21:18:07+00:00monthlyhttps://osunpk.com/2025/06/09/double-crop-options-after-wheat-ksu-edition/https://osunpk.com/wp-content/uploads/2025/06/double-crop-options-after-wheat-f02.jpgDouble-crop-options-after-wheat-F02https://osunpk.com/wp-content/uploads/2025/06/double-crop-options-after-wheat-f01.jpgDouble-crop-options-after-wheat-F012025-06-09T21:21:33+00:00monthlyhttps://osunpk.com/2025/06/03/meet-the-aster-leafhopper-and-learn-how-to-distinguish-it-from-the-corn-leafhopper/https://osunpk.com/wp-content/uploads/2025/06/faris6.3.25_2.pngFaris6.3.25_2https://osunpk.com/wp-content/uploads/2025/06/faris6.3.25_1.pngFaris6.3.25_12025-06-03T16:20:17+00:00monthlyhttps://osunpk.com/2025/06/02/pre-emergent-residual-herbicide-activity-on-soybeans-2025/https://osunpk.com/wp-content/uploads/2025/06/galvin-fig-1.pngGalvin Fig 1https://osunpk.com/wp-content/uploads/2025/06/galvintable-1.pngGalvinTable 12025-06-03T16:09:35+00:00monthlyhttps://osunpk.com/2025/06/02/laboratory-evaluation-of-liquid-calcium/https://osunpk.com/wp-content/uploads/2025/05/fig-5.pngFig 5https://osunpk.com/wp-content/uploads/2025/05/fig-4.pngFig 4https://osunpk.com/wp-content/uploads/2025/05/fig-3.pngFig 3https://osunpk.com/wp-content/uploads/2025/05/fig-2.jpgFig 2https://osunpk.com/wp-content/uploads/2025/05/fig-1.gifFig 12025-06-02T20:19:41+00:00monthlyhttps://osunpk.com/2025/06/02/field-evaluation-of-lime-and-calcium-sources-impact-on-acidity/https://osunpk.com/wp-content/uploads/2025/06/oyster_data.pngOyster_Datahttps://osunpk.com/wp-content/uploads/2025/06/oyster_ca.pngOyster_Cahttps://osunpk.com/wp-content/uploads/2025/06/oysterbuffer.pngOysterBufferhttps://osunpk.com/wp-content/uploads/2025/06/oysterph.pngOysterpHhttps://osunpk.com/wp-content/uploads/2025/06/oyster-table.pngOyster Table2025-06-02T20:16:33+00:00monthlyhttps://osunpk.com/2025/04/17/sorghum-nitrogen-timing/https://osunpk.com/wp-content/uploads/2025/04/fig2_inch.pngfiG2_inchhttps://osunpk.com/wp-content/uploads/2025/04/nburn-perk.pngNBurn Perkhttps://osunpk.com/wp-content/uploads/2025/04/sorghum-n-rate.pngSorghum N ratehttps://osunpk.com/wp-content/uploads/2025/04/chick_pop_n.pngChick_pop_Nhttps://osunpk.com/wp-content/uploads/2025/04/bix_pop_n.pngBix_Pop_Nhttps://osunpk.com/wp-content/uploads/2025/04/fig3.pngFig3https://osunpk.com/wp-content/uploads/2025/04/fig2.pngFig2https://osunpk.com/wp-content/uploads/2025/04/fig1.pngFig12025-04-29T16:25:50+00:00monthlyhttps://osunpk.com/2025/04/17/boosting-wheat-grain-protein-smart-spray-strategies-for-better-grain-quality/https://osunpk.com/wp-content/uploads/2025/04/figure-3.jpgFigure 3https://osunpk.com/wp-content/uploads/2025/04/figure-2.jpgFigure 2https://osunpk.com/wp-content/uploads/2025/04/figure-1-jpg.jpgFigure 1 JPG2025-04-18T13:25:06+00:00monthlyhttps://osunpk.com/2025/03/04/nitrogen-and-sulfur-in-wheat/https://osunpk.com/wp-content/uploads/2025/03/nands-timing.jpgNandS Timinghttps://osunpk.com/wp-content/uploads/2025/03/ntiming.jpgNTiminghttps://osunpk.com/wp-content/uploads/2025/03/stable.jpgSTablehttps://osunpk.com/wp-content/uploads/2025/03/ntime_table.jpgNTime_Tablehttps://osunpk.com/wp-content/uploads/2025/03/map.jpgMaphttps://osunpk.com/wp-content/uploads/2025/03/treatment-.jpgTreatment2025-03-04T22:20:36+00:00monthlyhttps://osunpk.com/2025/03/04/management-of-soybean-inoculum/https://osunpk.com/wp-content/uploads/2025/03/figure-4_sb_blog.jpgFigure 4_SB_Bloghttps://osunpk.com/wp-content/uploads/2025/03/figure-3-_sbblog.jpgFigure 3 _SBBLoghttps://osunpk.com/wp-content/uploads/2025/03/figure-2_sb-blog.jpgFigure 2_SB BLoghttps://osunpk.com/wp-content/uploads/2025/03/figure-1_sb_blog.jpgFigure 1_SB_blog2025-03-04T17:53:47+00:00monthlyhttps://osunpk.com/2024/10/31/a-comparison-of-four-nitrogen-sources-in-no-till-wheat/https://osunpk.com/wp-content/uploads/2024/10/figure-9-and-9b.-corrected-1.jpgFigure 9 and 9b. correctedhttps://osunpk.com/wp-content/uploads/2024/10/figure-10-and-10b-corrected-1.jpgFigure 10 and 10b correctedhttps://osunpk.com/wp-content/uploads/2024/10/figure-10-and-10b-corrected.jpgFigure 10 and 10b correctedhttps://osunpk.com/wp-content/uploads/2024/10/figure-9-and-9b.-corrected.jpgFigure 9 and 9b. correctedhttps://osunpk.com/wp-content/uploads/2024/10/figure-1.1.jpgFigure 1.1https://osunpk.com/wp-content/uploads/2024/10/figure-1-1.jpgFigure 12024-11-07T03:21:39+00:00monthlyhttps://osunpk.com/2023/09/27/in-furrow-placement-of-urea-products-with-wheat-seed/https://osunpk.com/wp-content/uploads/2023/09/figure-4.jpgfigure-4https://osunpk.com/wp-content/uploads/2023/09/figure-3.jpgfigure-3https://osunpk.com/wp-content/uploads/2023/09/figure-2.jpgfigure-2https://osunpk.com/wp-content/uploads/2023/09/figure-1.jpgfigure-1https://osunpk.com/wp-content/uploads/2023/09/direct-contact.jpgdirect-contacthttps://osunpk.com/wp-content/uploads/2023/09/image.pngimage2023-09-28T13:35:23+00:00monthlyhttps://osunpk.com/2023/09/10/how-do-you-handle-your-soil-sample/https://osunpk.com/wp-content/uploads/2023/09/samples-in-van.jpgsamples-in-vanhttps://osunpk.com/wp-content/uploads/2023/09/nh4label.jpgnh4labelhttps://osunpk.com/wp-content/uploads/2023/09/no3-label.jpgno3-labelhttps://osunpk.com/wp-content/uploads/2023/09/soils-drying.jpgsoils-dryinghttps://osunpk.com/wp-content/uploads/2023/09/soil-bags.jpgsoil-bagshttps://osunpk.com/wp-content/uploads/2023/09/mst_label.jpgmst_labelhttps://osunpk.com/wp-content/uploads/2023/09/soil-temp-graph.jpgsoil-temp-graph2023-09-11T03:08:01+00:00monthlyhttps://osunpk.com/2023/07/14/chinch-bugs-are-active/https://osunpk.com/wp-content/uploads/2023/07/img_3053.jpgimg_3053https://osunpk.com/wp-content/uploads/2023/07/chinch-bugs-f02a.jpgchinch-bugs-f02ahttps://osunpk.com/wp-content/uploads/2023/07/chinch-bugs-f01.jpgchinch-bugs-f012023-07-14T15:15:20+00:00monthlyhttps://osunpk.com/2023/05/04/grain-sorghum-2023-edition/2023-05-07T14:57:56+00:00monthlyhttps://osunpk.com/2023/01/24/mechanics-of-soil-fertility-the-hows-and-whys-of-the-things/https://osunpk.com/wp-content/uploads/2023/01/clay-particle.jpgclay-particlehttps://osunpk.com/wp-content/uploads/2023/01/farm-progress-ag-lime-piles-1.webpfarm-progress-ag-lime-piles-1https://osunpk.com/wp-content/uploads/2023/01/farm-progress-ag-lime-piles.webpfarm-progress-ag-lime-piles2023-01-24T18:45:23+00:00monthlyhttps://osunpk.com/2023/01/12/jan-2023-edition-of-wheat-n-management/2023-01-12T14:50:40+00:00monthlyhttps://osunpk.com/2022/09/28/did-in-furrow-starter-products-increase-yields/2022-09-28T16:19:12+00:00monthlyhttps://osunpk.com/2022/09/10/soil-sample-handling-practices-can-affect-soil-nitrate-test-accuracy/https://osunpk.com/wp-content/uploads/2022/09/soil-sampling-handling-f02.jpgsoil-sampling-handling-f02https://osunpk.com/wp-content/uploads/2022/09/soil-sampling-handling-f01.jpgsoil-sampling-handling-f012022-09-10T12:55:47+00:00monthlyhttps://osunpk.com/2022/08/30/phosphorus-decisions-is-it-worth-cutting-p/https://osunpk.com/wp-content/uploads/2022/08/20151002-34983-1.jpgLiquid fertilizer test during planting of notill wheat.At Planting fertilizer research for no-till wheat. Comparing various chemicals and ratios during time of planting. Test are being conducted at the Cimarron Valley Research Station near Perkins Oklahoma.https://osunpk.com/wp-content/uploads/2022/08/grid_ph_p.jpggrid_ph_phttps://osunpk.com/wp-content/uploads/2022/08/soil-test-ranges.pngsoil-test-ranges2022-08-30T15:26:12+00:00monthlyhttps://osunpk.com/2022/08/26/impact-of-nitrogen-timing-2021-22-version/https://osunpk.com/wp-content/uploads/2022/08/fig-3.jpgfig-3https://osunpk.com/wp-content/uploads/2022/08/fig-2.jpgfig-2https://osunpk.com/wp-content/uploads/2022/08/rain.jpgrainhttps://osunpk.com/wp-content/uploads/2022/08/treatment-structure..jpgtreatment-structure.https://osunpk.com/wp-content/uploads/2022/08/perkgxn.jpgperkgxn2022-08-26T21:58:41+00:00monthlyhttps://osunpk.com/2022/08/24/nitrogen-cycle-hiccups-and-a-lot-of-drying/2022-08-24T20:49:20+00:00monthlyhttps://osunpk.com/2022/07/23/to-bale-or-not-to-bale/https://osunpk.com/wp-content/uploads/2022/07/rcf_2008.jpgRCF_2008https://osunpk.com/wp-content/uploads/2022/07/jeffwessles.jpgJeffWessleshttps://osunpk.com/wp-content/uploads/2022/07/adam-baldwin.jpgAdam Baldwin2022-07-25T18:35:30+00:00monthlyhttps://osunpk.com/2022/06/29/top-dress-wheat-with-p-and-k/https://osunpk.com/wp-content/uploads/2022/06/sfandof.jpgSFandOf2022-06-29T19:09:24+00:00monthlyhttps://osunpk.com/2022/04/08/in-season-n-application-methods-for-sorghum/2022-04-08T19:59:14+00:00monthlyhttps://osunpk.com/2022/04/07/can-grain-sorghum-wait-on-nitrogen-one-more-year-of-data/2022-04-08T13:06:36+00:00monthlyhttps://osunpk.com/2022/03/29/is-there-still-time-for-nitrogen/2022-03-30T03:57:46+00:00monthlyhttps://osunpk.com/2022/02/23/utilizing-n-fixing-biologicals/2022-02-23T21:38:29+00:00monthlyhttps://osunpk.com/2022/02/04/pre-plant-irrigation/2022-02-04T16:55:04+00:00monthlyhttps://osunpk.com/2021/03/22/can-grain-sorghum-wait-on-nitrogen/2022-01-21T20:26:40+00:00monthlyhttps://osunpk.com/2020/09/10/value-of-in-season-application-for-grain-only-wheat-production/https://osunpk.com/wp-content/uploads/2020/09/table.jpgtableTable 1: Summary of all trial locations and years. The X represents statistical significance, alpha = 0.05. In-season application represents all treatments applied at least 30 growing degree days after planting. Majority of the treatments in the studies were applied after spring green up. https://osunpk.com/wp-content/uploads/2020/09/uptake.jpguptakeFigure 1: Nitrogen uptake of winter wheat from planting to harvest. Adapted from Silva et al.2019. Kansas State University dissertation. https://osunpk.com/wp-content/uploads/2020/09/rendel_strips.pngRendel_Stripshttps://osunpk.com/wp-content/uploads/2020/09/nh4no3-delay.jpgNH4NO3-DelayFigure 2: Image of the delayed nitrogen study with treatments identified. 2022-10-20T23:38:07+00:00monthlyhttps://osunpk.com/2022/01/21/its-dry-and-nitrogen-cost-a-lot-what-now/2022-01-21T20:13:25+00:00monthlyhttps://osunpk.com/2021/10/13/the-easy-button-for-nitrogen/2021-10-14T00:35:35+00:00monthlyhttps://osunpk.com/2021/09/28/banding-p-as-a-to-band-aid-soil-acidity-not-so-cheap-now/2021-09-29T03:05:59+00:00monthlyhttps://osunpk.com/2021/09/21/split-n-application-pays-in-graze-out-wheat/2021-09-21T16:40:08+00:00monthlyhttps://osunpk.com/2021/09/20/in-furrow-fertilizers-for-wheat/2021-09-20T23:28:34+00:00monthlyhttps://osunpk.com/2021/09/03/nitrogen-rich-strips-a-reminder/2021-09-03T23:18:07+00:00monthlyhttps://osunpk.com/2021/09/01/nitrogen-source-whats-cheap-now-may-be-lost-later/2021-09-01T17:32:23+00:00monthlyhttps://osunpk.com/2021/08/22/soil-acidity-and-cotton-production/https://osunpk.com/wp-content/uploads/2021/08/stand.jpgStand2021-08-22T17:46:02+00:00monthlyhttps://osunpk.com/2021/08/22/sorghum-late-season-management-and-pests-emerging/2021-08-22T16:55:33+00:00monthlyhttps://osunpk.com/2021/03/22/nitrogen-timing-in-a-winter-wheat-forage-system/2021-06-01T13:55:53+00:00monthlyhttps://osunpk.com/2020/03/31/yellow-wheat-the-2020-edition/https://osunpk.com/wp-content/uploads/2020/04/topdressing-wheat-with-sulfur-f01b.jpgTopdressing-wheat-with-sulfur-F01b Sulfur deficiency in wheat. Photos by Dorivar Ruiz Diaz, K-State Research and Extensionhttps://osunpk.com/wp-content/uploads/2020/03/img_4512.jpgIMG_4512https://osunpk.com/wp-content/uploads/2020/03/img_4548-e1585709450982.pngIMG_4548https://osunpk.com/wp-content/uploads/2020/03/img_4535.jpgIMG_4535https://osunpk.com/wp-content/uploads/2020/03/roots-e1585707209971.jpgrootshttps://osunpk.com/wp-content/uploads/2020/03/powerflex.jpgPowerflexhttps://osunpk.com/wp-content/uploads/2020/03/img_4476.jpgIMG_4476https://osunpk.com/wp-content/uploads/2020/03/img_4474-e1585706526413.jpgIMG_4474https://osunpk.com/wp-content/uploads/2020/03/significance-table.jpgSignificance Tablehttps://osunpk.com/wp-content/uploads/2020/03/loc-by-year.jpgloc by year2022-04-27T16:34:36+00:00monthlyhttps://osunpk.com/2019/09/16/on-farm-nitrogen-rate-study-results-18-19/https://osunpk.com/wp-content/uploads/2019/09/img_1562.jpgIMG_1562Figure 4. Crew hand harvesting on farm N rate plots. Hand harvest is preferred because A) we are able to harvest at a higher moisture content ahead of the farmers combines B) we do not have to haul the plot combine across the state. https://osunpk.com/wp-content/uploads/2019/09/capron_lahoma.jpgCapron_LahomaWinter wheat grain yield and protein content results from on farm nitrogen rate studies performed in 2018-19 at Capron Ok, and Lahoma Ok. https://osunpk.com/wp-content/uploads/2019/09/state.jpgStateLocation of the 2018-19 on farm winter wheat nitrogen response studies. Color shades represent climatic zones. https://osunpk.com/wp-content/uploads/2019/09/byron_perkins.jpgByron_PerkinsWinter wheat grain yield and protein content results from on farm nitrogen rate studies performed in 2018-19 at Byron Ok, and Perkins Ok. 2019-09-17T04:35:45+00:00monthlyhttps://osunpk.com/2019/06/25/double-crop-response-to-additional-n-p-k-and-s/https://osunpk.com/wp-content/uploads/2019/06/npks_img.jpgNPKS_imgDouble crop soybeans in Ottawa County with strips of nitrogen, phosphorus, potassium, and sulfur applied post plant. https://osunpk.com/wp-content/uploads/2019/06/image3.jpegimage3NPKS Strip Applicator. This ground driven 3pt rig uses Gandy boxes to deliver fertilizer into tubes which is then blown, by a PTO driven fan, out into strips 6 feet wide, per box. This applicator was putting out 200 lbs of Urea, 0-46-0, potash, and gypsum out per acre. https://osunpk.com/wp-content/uploads/2019/06/dc_map.jpgDC_mapLocations of double crop fertility response strips applied in the summers of 2016 and 2017. 2019-08-31T17:04:32+00:00monthlyhttps://osunpk.com/2019/08/14/how-long-can-wheat-wait-for-nitrogen-one-more-year-of-data/https://osunpk.com/wp-content/uploads/2019/08/newkirk19.jpgNewkirk19Grain yield and protein results from the delayed nitrogen study preformed at the Ballagh research farm near Newkirk in 2018-2019.https://osunpk.com/wp-content/uploads/2019/08/lcb19.jpgLCB_Delayed N_19Yield and Protein results from the delayed N study at Lake Carl Blackwell near Perry Oklahoma. 2019-08-31T17:03:39+00:00monthlyhttps://osunpk.com/2019/08/29/watch-forage-nitrate-closely-on-certain-crops/https://osunpk.com/wp-content/uploads/2019/08/zhang1.jpgZhang1Figure 1. Summary of our laboratory nitrate test results in the past on two major warm season forage crops. 2019-08-31T17:02:39+00:00monthlyhttps://osunpk.com/2019/08/29/nitrogen-rate-and-timing-for-a-forage-wheat-crop-year-1-results/https://osunpk.com/wp-content/uploads/2019/08/figure-1.jpgFigure 1Figure 1. Dry matter harvest results for each of the harvest dates from the graze out wheat trials from the Chickasha, Lake Carl Blackwell, and Dupy locations for three fertilizer treatments. 60: 60 lbs of nitrogen applied preplant, 120: 120 lbs of nitrogen applied preplant, 60/60: Split application 60 lbs of nitrogen preplant and 60 lbs applied top-dress. Dupy only had one harvest date, the Mid-season yield is estimated via rise-plate measurements taken at Feekes 7.5. https://osunpk.com/wp-content/uploads/2019/08/figure-2.jpgFigure 2Figure 2. Total dry matter harvest results for the graze out wheat trials from the Chickasha, Lake Carl Blackwell (LCB), and Dupy locations for three fertilizer treatments. 60: 60 lbs of nitrogen applied preplant, 120: 120 lbs of nitrogen applied preplant, 60/60: Split application 60 lbs of nitrogen preplant and 60 lbs applied top-dress.https://osunpk.com/wp-content/uploads/2019/08/figure-3.jpgFigure 3Figure 3. Total nitrogen uptake results for the graze out wheat trials from the Chickasha, Lake Carl Blackwell, and Dupy locations for three fertilizer treatments. 60: 60 lbs of nitrogen applied preplant, 120: 120 lbs of nitrogen applied preplant, 60/60: Split application 60 lbs of nitrogen preplant and 60 lbs applied top-dress.2019-08-31T17:02:01+00:00monthlyhttps://osunpk.com/2019/08/29/dap-in-short-supply-revisiting-dap-vs-map-source-may-matter/2019-08-29T14:47:19+00:00monthlyhttps://osunpk.com/2019/05/20/recent-weather-causing-corn-and-sorghum-injury-from-pre-emerge-herbicides-2/2019-05-20T15:03:37+00:00monthlyhttps://osunpk.com/2019/05/09/the-pick-2-dilemma-of-nitrogen-management/https://osunpk.com/wp-content/uploads/2019/01/good-fast-cheap.jpggood-fast-cheaphttps://osunpk.com/wp-content/uploads/2019/01/pick2_n.jpgpick2_nhttps://osunpk.com/wp-content/uploads/2019/01/pick-2-n.jpgPick 2 Nitrogen2019-05-09T14:57:31+00:00monthlyhttps://osunpk.com/2019/05/08/managing-protein-in-hard-red-winter-wheat_repost-and-update/https://osunpk.com/wp-content/uploads/2019/05/proteinpro.pngProteinProResults from the 2017-18 Protein Progression Study. 2019-05-09T14:08:10+00:00monthlyhttps://osunpk.com/2018/10/27/rain-makes-grain-but-also-washes-nitrogen-away/https://osunpk.com/wp-content/uploads/2018/10/90day_rain.png90Day_Rain90 Day rainfall totals retrieved from Mesonet on 10.26.18 http://www.mesonet.org/index.php/weather/category/rainfallhttps://osunpk.com/wp-content/uploads/2018/10/30day_rain.png30Day_Rain30 Day rainfall totals retrieved from Mesonet on 10.26.18 http://www.mesonet.org/index.php/weather/category/rainfallhttps://osunpk.com/wp-content/uploads/2018/10/60day_rain.png60Day_Rain60 Day rainfall totals retrieved from Mesonet on 10.26.18 http://www.mesonet.org/index.php/weather/category/rainfallhttps://osunpk.com/wp-content/uploads/2018/10/no3-losses.jpgNO3 LossesNitrate loss pathways of the Nitrogen Cycle. Complete Nitrogen Cycle. http://psssoil4234.okstate.edu/lecturehttps://osunpk.com/wp-content/uploads/2018/10/n-cycle.jpgN-CYCLEComplete Nitrogen Cycle. http://psssoil4234.okstate.edu/lecturehttps://osunpk.com/wp-content/uploads/2018/10/nitrification.jpgNitrificationNitrification portion of the Nitrogen Cycle. Complete Nitrogen Cycle. http://psssoil4234.okstate.edu/lecture2018-10-27T17:29:25+00:00monthlyhttps://osunpk.com/2018/10/19/planting-date-and-seeding-rate-considerations-for-winter-wheat/https://osunpk.com/wp-content/uploads/2018/10/fig1-planting-date.jpgFig1 planting datehttps://osunpk.com/wp-content/uploads/2018/10/fig2-seeding-rate.jpgFig2 seeding rate2018-10-19T13:06:31+00:00monthlyhttps://osunpk.com/2014/05/30/banding-p-as-a-band-aid-for-low-ph-soils/https://osunpk.com/wp-content/uploads/2014/05/picture6.jpgPicture6Figure 5. The concentration of Glean (Cholorsulfuron) remaining in too soils (pH 7.5 and pH 5.6) over a twelve week period. https://osunpk.com/wp-content/uploads/2014/05/picture5.jpgPicture5Table 1. Cumulative cost per acre of applying phosphorus and lime to remediate aluminum and manganese toxicity based on a five year liming cycle. The 30 lb P2O5 rate is recommended for grain only production while dual-purpose wheat require 60 P2O5. Prices based on current quotes of DAP at $590 a ton ($0.41 lb P2O5) and Ag lime at $30 per ton ECCE. https://osunpk.com/wp-content/uploads/2014/05/picture4.jpgPicture4Figure 4. The impact of applying of phosphate fertilizer and lime on the forage production of two winter wheat cultivars in Oklahoma. Chart adapted from Kaitibie et al. 2002. https://osunpk.com/wp-content/uploads/2014/05/picture3.jpgPicture3Figure 3. The impact of banding phosphate with seed at planting in acidic soils on winter wheat forage production in Oklahoma. Chart adapted from Boman et al. 1992. https://osunpk.com/wp-content/uploads/2014/05/picture2.jpgPicture2Figure 2. Summary of the soil pH values for the 614 samples submitted to the Oklahoma State University Soil, Water, Forage, Analytical Laboratory under wheat crop code during the time frame of 1-1-2011 11-30-2011. https://osunpk.com/wp-content/uploads/2014/05/picture1.jpgPicture1Figure 1. The cover of an extension brochure distributed in Oklahoma during the 1980s. 2018-10-07T02:35:42+00:00monthlyhttps://osunpk.com/2018/10/01/how-long-can-wheat-wait-for-nitrogen/https://osunpk.com/wp-content/uploads/2018/10/plant-n-uptake.jpgPlant N-UpTakeWheat N-uptake. Figure adapted from Lollato et al. https://osunpk.com/wp-content/uploads/2018/10/gddfp.jpgGDDFPGrowing degree days > 0 from planting and equivalent calendar days for all experimental sites (Lake Carl Blackwell, Perkins, Lahoma, Stillwater) utilized in the study evaluating the impact nitrogen fertilizer timing on winter wheat, conducted in north central Oklahoma over the 2016-2017 and 2017-2018 winter wheat growing seasons.https://osunpk.com/wp-content/uploads/2018/10/2017-18-results-figure.jpg2017-18 Results Figure2017-2018 Delayed nitrogen winter wheat grain yield and protein results. The Perkins location in 18 was the only location in the study which did not have a statistically significant response to added N. https://osunpk.com/wp-content/uploads/2018/10/2016-17-results-figure.jpg2016-17 Results Figure2016-2017 Delayed nitrogen winter wheat grain yield and protein results. For the locations of Perkins and N40 the Dec-1 application has a higher yield due to a 2x application of N to equal 180 lbs. https://osunpk.com/wp-content/uploads/2018/10/tables-2-3-yield-and-protein.jpgTables 2-3 Yield and ProteinTables 2-3 shows the winter wheat grain yield and protein concentration, respectively, of all treatments. The colors of the cells represent statistical difference from the Pre-plant treatment. Treatments with cells shaded yellow are equal to the pre-plant, Green is statistically greater than while red is statistically less than the pre-plant treatment. https://osunpk.com/wp-content/uploads/2018/10/perkins_2017.jpgPerkins_2017Image of the 2016-17 Perkins location. Image collected March 21 2017. https://osunpk.com/wp-content/uploads/2018/10/picture1.jpgDate TableTable 1 shows the planting date, date of first visual difference (0DAVD) and each of the application dates for all locations. Different colors represent individual months. Hollow stem occurred approximately Feb 20 in the 2017 crop and March 10th in the 18 crop. 2018-10-16T17:03:11+00:00monthlyhttps://osunpk.com/2018/10/01/the-challenge-of-collecting-a-representative-soil-sample/https://osunpk.com/wp-content/uploads/2018/10/figure-11.jpgFigure 1Figure 1. The level of accuracy of the results of a soil test will depend, in part, on how many subsamples were taken to create the composite sample. In general, a composite sample should consist of 15 or more subsamples. For better accuracy, 20-30 cores, or subsamples, should be taken and combined into a representative sample. Fhttps://osunpk.com/wp-content/uploads/2018/10/figure-21.jpgFigure 2Figure 2. Consistency is sampling depth is particularly important for immobile nutrients like P. Stratification of nutrients and pH can be accentuated under reduced tillage. 2018-10-01T14:33:24+00:00monthlyhttps://osunpk.com/2018/06/06/how-does-soil-ph-impact-herbicides/2018-06-06T19:36:21+00:00monthlyhttps://osunpk.com/2018/05/16/ag-apps-5-years-later/https://osunpk.com/wp-content/uploads/2018/05/diseaseid.jpgDiseaseIDDisease ID BASFhttps://osunpk.com/wp-content/uploads/2018/05/canopeo.jpgCanopeoCanopeohttps://osunpk.com/wp-content/uploads/2018/05/okstate-soiil.jpgOKState SoiilOKState Soil Sample Apphttps://osunpk.com/wp-content/uploads/2018/05/irrigation.jpgIrrigationCrop Nutrients in Irrigation Water Calculatorhttps://osunpk.com/wp-content/uploads/2018/05/grain-drill.jpgGrain DrillGrain Drill and Planter Calibration Calculatorhttps://osunpk.com/wp-content/uploads/2018/05/foodplot.jpgFoodPlotWildlife Food Plot Appshttps://osunpk.com/wp-content/uploads/2018/05/plot-calc.jpgPlot CalcPlot Calculatorhttps://osunpk.com/wp-content/uploads/2018/05/cornyieldcalc.jpgCornYieldCalcCorn Yield Calculator by Kinetic Thoughtshttps://osunpk.com/wp-content/uploads/2018/05/harvestloss1.jpgHarvestLossHarvest Loss App by Ag PhDs.https://osunpk.com/wp-content/uploads/2018/05/plantdef.jpgPLANTDEFDeficiencies by AgPhD2018-05-17T20:28:06+00:00monthlyhttps://osunpk.com/2018/05/15/soil-sampling-for-ph-and-liming-in-continuous-no-till-fields/2018-05-19T02:08:33+00:00monthlyhttps://osunpk.com/2018/05/03/pelletized-lime-how-quickly-does-it-react/2018-05-03T14:22:38+00:00monthlyhttps://osunpk.com/2018/02/25/nitrogen-management-report-card/https://osunpk.com/wp-content/uploads/2018/02/wheat-only-2.jpgWheat only 2https://osunpk.com/wp-content/uploads/2018/02/rotation-with-legume-2.jpgRotation with Legume 2https://osunpk.com/wp-content/uploads/2018/02/crop-rotation-no-legume-2.jpgCrop Rotation, no-legume 2https://osunpk.com/wp-content/uploads/2018/02/nitrogen-in-crop.jpgNitrogen in cropPounds of nitrogen removed per one unit of yield harvested. These values are generalized averages and can change based on environment, management, and cultivar. https://osunpk.com/wp-content/uploads/2018/02/report-card.jpgreport cardhttps://osunpk.com/wp-content/uploads/2018/02/yield-and-nitrogen-rate.jpgYield and Nitrogen Rate2018-03-05T17:27:23+00:00monthlyhttps://osunpk.com/2014/02/24/sensing-the-n-rich-strip-and-using-the-sbnrc/https://osunpk.com/wp-content/uploads/2014/02/nrich21.pngNrich2Winter Wheat and Nitrogen Rich Strips.https://osunpk.com/wp-content/uploads/2014/02/gs_hhnumber1-e1393271433763.jpgGS_HHnumberGreenSeeker HandHeld NDVI Sensor2018-02-23T20:40:51+00:00monthlyhttps://osunpk.com/2018/02/23/re-post-sensing-the-n-rich-strip-and-using-the-sbnrc/2018-02-23T20:40:20+00:00monthlyhttps://osunpk.com/2018/02/01/poly-versus-ortho-another-year-of-data-from-iowa/https://osunpk.com/wp-content/uploads/2018/02/on-farm-study-near-traer-iowa-2017.jpgon-farm-study-near-traer-iowa-2017https://osunpk.com/wp-content/uploads/2018/02/on-farm-study-near-traer-iowa-2016.jpgon-farm-study-near-traer-iowa-20162018-02-02T04:15:58+00:00monthlyhttps://osunpk.com/2018/01/22/its-dry-and-its-time-to-top-dress/https://osunpk.com/wp-content/uploads/2018/01/img_3063.jpgTye UreaUsing a 3pt Conventional double disk tye drill to apply urea in-season https://osunpk.com/wp-content/uploads/2018/01/mesonet-rainfall-quarterinch.pngmesonet.rainfall.quarterinchhttps://osunpk.com/wp-content/uploads/2018/01/meso.jpgMesonet Dry TwitterThe Oklahoma Mesonet tweet from Jan 18th the current lack of rain status and the impending lack of more rain. 1.18.20182018-01-22T22:53:48+00:00monthlyhttps://osunpk.com/2017/09/27/managing-protein-in-hard-red-winter-wheat/https://osunpk.com/wp-content/uploads/2017/09/nutrientuptake.jpgNutrientUptakeNutrient Uptake of Wheat found in "Agricultural and Biological Sciences » "Crop Production", ISBN 978-953-51-1174-0, Chapter 5 By Juan Hirzel and Pablo Undurraga DOI: 10.5772/56095"https://osunpk.com/wp-content/uploads/2017/09/longterm.jpgLongTermhttps://osunpk.com/wp-content/uploads/2017/09/lollato-yield.jpgLollato yieldhttps://osunpk.com/wp-content/uploads/2017/09/large-scale-sbnrc.jpgLarge Scale SBNRChttps://osunpk.com/wp-content/uploads/2017/09/delayed-n-study-17.jpgDelayed N study 17https://osunpk.com/wp-content/uploads/2017/09/barley-uptake.jpgBarley UptakeNitrogen uptake in Barley at two nitrogen rates. http://apps.cdfa.ca.gov/frep/docs/N_Barley.htmlhttps://osunpk.com/wp-content/uploads/2015/08/nrs.jpgNRSNitrogen Rich Strip (N-Rich) showing up in a No-till wheat field. 2017-09-27T18:36:40+00:00monthlyhttps://osunpk.com/2017/09/15/2017-18-wheat-nitrogen-outlook/https://osunpk.com/wp-content/uploads/2017/09/mesonet-daily-current-paw40-grad.pngmesonet.daily.current.PAW40.gradThe 1-day Average 16-inch Plant Available Water map from www.mesonet.org. Accessed 9.07.17https://osunpk.com/wp-content/uploads/2017/08/img_2044.jpgIMG_2044https://osunpk.com/wp-content/uploads/2017/08/moisture8-27-107.jpgMoisture8.27.107The 1-day Average 16-inch Plant Available Water map from www.mesonet.org. Accessed 8.28.172017-09-19T14:00:39+00:00monthlyhttps://osunpk.com/2017/08/07/using-a-grain-drill-grain-box-for-fertilizer-results-and-a-calibration-guide/https://osunpk.com/wp-content/uploads/2017/08/chickasha-drilled-n.jpgChickasha Drilled Nhttps://osunpk.com/wp-content/uploads/2017/08/lahoma-drilled-n.jpgLahoma Drilled NPartial year one results from the topdress N with a grain drill at Lahoma Ok. Timing 1 was late January and timing 2 was mid-late February, and timing 3 was early March. https://osunpk.com/wp-content/uploads/2017/08/urea-table.jpgUREA TableTable documenting the manufacturer wheat rate setting and the resulting amount of Urea 46-0-0. https://osunpk.com/wp-content/uploads/2017/08/urea-graph.jpgUREA GraphGraph documenting the manufacturer wheat rate setting and the resulting amount of Urea 46-0-0. https://osunpk.com/wp-content/uploads/2017/08/dap-table.jpgDAP TableTable showing the manufacturer wheat rate setting and the resulting amount of DAP 18-46-0. https://osunpk.com/wp-content/uploads/2017/08/dap-graph.jpgDAP GraphGraph documenting the manufacturer wheat rate setting and the resulting amount of DAP 18-46-0. 2018-02-01T02:07:56+00:00monthlyhttps://osunpk.com/2017/08/03/scouting-app-review/https://osunpk.com/wp-content/uploads/2017/08/climate.jpgClimateClimate provides current weather, hourly and 6 day forecast along with seasonal weather data based upon field planting date. https://osunpk.com/wp-content/uploads/2017/08/sirrus.jpgSirrusSirrus shows current weather on the fields home screen with the option to look at hourly and 10 day forecast along with historical precip data. https://osunpk.com/wp-content/uploads/2017/08/farmlogs.jpgFarmLogsFarmLogs scouting app graphed the rainfall and GDD heat unit accumulation over the growing period. https://osunpk.com/wp-content/uploads/2017/08/scouting.jpgScoutingThis list shows the scouting functions of the applications reviewed. https://osunpk.com/wp-content/uploads/2017/08/other.jpgOtherThis table list the applications with can create management zones, send VRT files, and have access to satellite imagery. https://osunpk.com/wp-content/uploads/2017/08/cropinfo.jpgCropInfoThis table list the applications which the crop information (crop type, variety/hybrid, population and planting date. The table also list the applications which had access to SURGO soil type data. https://osunpk.com/wp-content/uploads/2017/08/field.jpgFieldThis table shows which mobile applications can apply field boundaries from the device, which applications utilize CLUs (common land units) and shape files. https://osunpk.com/wp-content/uploads/2017/08/weather.jpgWeatherThis table shows the weather and forecast features on the mobile and desktop applications. https://osunpk.com/wp-content/uploads/2017/08/group.jpgGroupIf a web or desktop based program was needed to direct actions I categorized the application as best fit for larger consulting groups. https://osunpk.com/wp-content/uploads/2017/08/software-web.jpgSoftware -webScouting apps could operate either independently of or in conjunction with a web/desktop program or was dependent upon a web/desktop program. 2022-12-27T21:48:45+00:00monthlyhttps://osunpk.com/2017/06/22/time-to-re-post-an-old-post-sorghum-injuries-from-pre-emerge-herbicides/https://osunpk.com/wp-content/uploads/2017/06/img_4018.jpgInjurySorghum with likely atrazine injury2017-06-22T15:23:28+00:00monthlyhttps://osunpk.com/2017/06/20/save-the-date-for-the-2017-oklahoma-crops-conference/https://osunpk.com/wp-content/uploads/2017/06/2017-ok-crops-conference-save-the-date.jpg2017 OK Crops Conference - Save the date2017-06-20T18:10:47+00:00monthlyhttps://osunpk.com/2017/04/25/comparing-orthopoly-phosphate-ratios-for-in-furrow-seed-safe-starter-fertilizer/https://osunpk.com/wp-content/uploads/2017/04/4-25-17-blog-768x432.jpg4-25-17-blog-768x432Picture 1 Planting starter fertilizer trials near Traer, IA in the growing season of 2016.https://osunpk.com/wp-content/uploads/2017/04/fig.jpgFigure 15 side-by-side comparisons of corn yield from two 6-24-6 starter fertilizers that contained either 50% ortho & 50% poly-phosphate or 80% ortho and 20% poly-phosphate. The field trial was conducted near Traer, IA in the growing season of 2016.2017-04-26T01:34:21+00:00monthlyhttps://osunpk.com/2017/04/06/nitrogen-source-selection-the-dollars-and-cents/https://osunpk.com/wp-content/uploads/2017/04/sprayer-with-rt200.jpgSprayer with RT200High clearance sprayer out fitted with streamer bars for UAN application and GreenSeeker RT-200 optical sensors for on the go variable rate nitrogen application.https://osunpk.com/wp-content/uploads/2017/04/speed.jpgAcres covered per hour.Acres covered per hour based on width and speed. High speed not applicable for NH3 application. 2017-04-06T19:10:31+00:00monthlyhttps://osunpk.com/2017/02/22/using-the-greenseeker-after-freeze-damage/2017-02-22T15:05:45+00:00monthlyhttps://osunpk.com/2014/01/06/freeze-injury-and-n-rich-strips/https://osunpk.com/wp-content/uploads/2014/01/freeze-3.pngFreeze 7 day movehttps://osunpk.com/wp-content/uploads/2014/01/freeze-1.pngfreeze Zero day movehttps://osunpk.com/wp-content/uploads/2014/01/freeze2.pngFreeze 14 day move2017-02-22T15:04:51+00:00monthlyhttps://osunpk.com/2016/07/18/ndvi-its-not-all-the-same/https://osunpk.com/wp-content/uploads/2016/07/optical-crisp-nus-edu-ag.gifoptical.crisp.nus.edu.agPicture representation of satellite remote sensing. http://www.crisp.nus.edu.sg/~research/tutorial/optical.htmhttps://osunpk.com/wp-content/uploads/2016/07/sensor1.jpgSENSORGraphic of how a active sensor emits light and detects light. https://osunpk.com/wp-content/uploads/2016/06/yld.jpgyldhttps://osunpk.com/wp-content/uploads/2016/06/ndvi_cor.jpgNDVI_Corhttps://osunpk.com/wp-content/uploads/2016/06/nvs0spec.jpgNvs0Spechttps://osunpk.com/wp-content/uploads/2016/06/plant-ref.jpgplant refhttps://osunpk.com/wp-content/uploads/2016/06/ndvi-cal.pngNDVI CalCalculation for NDVI. Any visible wavelegnth can be substituted for the red wavelength. 2017-02-13T15:56:18+00:00monthlyhttps://osunpk.com/2017/01/17/the-sufficiency-versus-replacement-tipping-point/https://osunpk.com/wp-content/uploads/2017/01/buildop.jpgbuildupAmount of P2O5 above crop removal needed to increase soil test phosphorous based upon intital soil test results. Adapted From http://www.spectrumanalytic.com/support/library/ff/Soil_test_P_and_K_buildup_and_drawdown.htm "Drawdown of Soil Test Phosphorus and Potassium Levels by Alfalfa, K.L. Wells & J.E. Dollarhide, Univ. of Kentucky, Soil Science News & Views, Vol. 21, No. 3, 2000"https://osunpk.com/wp-content/uploads/2017/01/numbers.jpgTable 1. Values used to calculate removal equivalent table.Values used to create Table 2. Phosphorus per bushel of grain. Mehlich 3 soil test value (ppm) at which crop is determined to be 90% sufficient, typical range of P2O5 applied with starter fertilizers, recommended P2O5 rate when soil test P is at 90% sufficiency.https://osunpk.com/wp-content/uploads/2017/01/ratebpa.jpgTable 2. Starter and Removal equivalentYield level (bushels per acre) at which P removal is equal to P added in starter fertilizer application. 2017-01-17T16:51:04+00:00monthlyhttps://osunpk.com/2017/01/13/components-of-a-variable-rate-nitrogen-recomendation/2017-01-13T19:27:28+00:00monthlyhttps://osunpk.com/2016/08/27/planting-wheat-after-anhydrous/https://osunpk.com/wp-content/uploads/2016/08/nh3.jpg5cf40e19dc7957f7fef6d03665a68492de8869872016-08-27T18:16:09+00:00monthlyhttps://osunpk.com/2016/08/27/now-may-not-be-the-time-for-replacement/https://osunpk.com/wp-content/uploads/2016/08/categories.jpgCategoriesThis conceptual soil test response curve is divided into categories that correspond with below opti-mum, optimum and above optimum soil test values. The critical level is the soil test level, below which a crop response to a nutrient application may be expected, and above which no crop response is expected. At very high soil test levels crop yield may decrease. *Rutgers Cooperative Extension Service FS719https://osunpk.com/wp-content/uploads/2016/08/soapbox_st.jpgsoapbox_SThttps://osunpk.com/wp-content/uploads/2016/08/category-and-application2.jpgCategory and application2Figure 1. This conceptual soil test response curve is divided into categories that correspond with below opti-mum, optimum and above optimum soil test values. The critical level is the soil test level, below which a crop response to a nutrient application may be expected, and above which no crop response is expected. At very high soil test levels crop yield may decrease. Figure 2. Nutrient application rates vary in relation to soil test category. Rutgers Cooperative Extension Service FS719https://osunpk.com/wp-content/uploads/2016/08/category-and-application.jpgCategory and application, RutgersFigure 1. This conceptual soil test response curve is divided into categories that correspond with below opti-mum, optimum and above optimum soil test values. The critical level is the soil test level, below which a crop response to a nutrient application may be expected, and above which no crop response is expected. At very high soil test levels crop yield may decrease. Figure 2. Nutrient application rates vary in relation to soil test category. Rutgers Cooperative Extension Service FS719 https://osunpk.com/wp-content/uploads/2016/08/sufficiency-table.gifP Sufficiency table Winter Wheat*Oklahoma State University Soil Test Interpretations. PSS-2225 *Mehlich 3 and Bray P are similar *PPM (parts per million) is used by most labs *STP (soil test P) is a conversion used by some Universities. Equivalent to pounds per acre. * for a 0-6” in soil sample PPM * 2 = STP. 2016-08-27T16:49:30+00:00monthlyhttps://osunpk.com/2016/07/29/soil-calcium-and-magnesium-levels-does-the-ratio-make-a-difference/2023-10-03T05:35:53+00:00monthlyhttps://osunpk.com/2016/10/01/precision-nutrient-management-in-forage-systems/2016-07-19T14:46:31+00:00monthlyhttps://osunpk.com/2016/07/18/2015-16-wheat-crop-nitrogen-review/https://osunpk.com/wp-content/uploads/2016/07/rotation.jpgRotationhttps://osunpk.com/wp-content/uploads/2016/07/rotation-trts.jpgRotation Trts.https://osunpk.com/wp-content/uploads/2016/07/deerpox.jpgDEERPOXhttps://osunpk.com/wp-content/uploads/2016/07/lcb-aerial.jpgLCB Aerialhttps://osunpk.com/wp-content/uploads/2016/07/rotation-average.jpgRotation yieldsCanola Wheat Rotation study year two yield average. yields average across previous years N-rates. https://osunpk.com/wp-content/uploads/2016/07/driver_raun.jpgDriver_RaunFigure 1. Work from Ethan Driver and Dr. Bill Raun. Study looked at rate and timing of N fertilization in wheat. https://osunpk.com/wp-content/uploads/2016/07/wheat-harvest-07.jpgwheat harvest 07https://osunpk.com/wp-content/uploads/2016/07/p1000542.jpgP10005422016-07-19T04:15:33+00:00monthlyhttps://osunpk.com/2016/07/18/dap-vs-map-source-may-matter/https://osunpk.com/wp-content/uploads/2016/07/mapvdap2.gifMAPvDAP2Relative yield winter wheat grain yield MAP and DAP both applied at equal rates of P (32 lbs P2O5 ac) when compared to a untreated check.https://osunpk.com/wp-content/uploads/2016/07/state-ph2.gifstate pH2Average soil pH of samples sent into OSU soil water forage analytical lab by county.https://osunpk.com/wp-content/uploads/2016/07/state-ph.gifState pHAverage soil pH of samples sent into OSU soil water forage analytical lab by county. https://osunpk.com/wp-content/uploads/2016/07/mapvdap1.gifMAPvDAPRelative yield winter wheat grain yield MAP and DAP both applied at equal rates of P (32 lbs P2O5 ac) when compared to a untreated check.2016-07-18T20:51:05+00:00monthlyhttps://osunpk.com/2016/07/17/sugarcane-aphids-numbers-are-building-in-oklahoma/https://osunpk.com/wp-content/uploads/2016/07/fig-5.jpgFig 5Figure 5. Sorghum headwormhttps://osunpk.com/wp-content/uploads/2016/07/fig-6.jpgFig 6Figure 6. Bucket sampling for headwormhttps://osunpk.com/wp-content/uploads/2016/07/fig-2.jpgFig 2Figure 2. Yellow sugarcane aphidhttps://osunpk.com/wp-content/uploads/2016/07/fig-3.jpgFig 3Figure 3. Sugarcane aphid colonyhttps://osunpk.com/wp-content/uploads/2016/07/fig-4.jpgFig 4Figure 4. "Whorlworm" damagehttps://osunpk.com/wp-content/uploads/2016/07/fig-1.jpgFig 1Figure 1. Sugarcane aphid2016-07-17T20:34:46+00:00monthlyhttps://osunpk.com/2016/05/16/wheat-disease-update-14-may-2016/https://osunpk.com/wp-content/uploads/2016/05/byd-flag-leaf.jpgBYD flag leafWheat tiller showing flag leaf with BYD symptoms but lower leaf greenhttps://osunpk.com/wp-content/uploads/2016/05/take-all.jpgtake allDarkened crown and roots due to take-allhttps://osunpk.com/wp-content/uploads/2016/05/take-all-heads.jpgtake all headsWhite heads indicating take-all and discolored roots and lower stems indicative of take-allhttps://osunpk.com/wp-content/uploads/2016/05/take-all-hands.jpgtake all handsWhite heads indicating take-all and discolored roots and lower stems indicative of take-all2016-05-17T03:54:26+00:00monthlyhttps://osunpk.com/2016/05/09/planting-considerations-after-hayed-or-failed-wheat-crop/https://osunpk.com/wp-content/uploads/2016/05/figure-1.jpgFigure 1Wheat Herbicide Restrictions2016-05-09T13:58:47+00:00monthlyhttps://osunpk.com/2016/04/17/learning-from-strip-trials/2016-04-18T03:01:46+00:00monthlyhttps://osunpk.com/2016/04/08/check-canola-for-aphids/https://osunpk.com/wp-content/uploads/2016/04/cabbage-aphid5-r-2004-small.jpgFile written with CompuPic(R) - Photodex Corporation (http://www.photodex.com)File written with CompuPic(R) - Photodex Corporation (http://www.photodex.com)https://osunpk.com/wp-content/uploads/2016/04/green-peach-aphid-ok-2013-2.jpgGreen Peach Aphid OK 2013 (2)https://osunpk.com/wp-content/uploads/2016/04/cfn2vmnviae1r0o-1.jpgCfN2vmNVIAE1r0O (1)Cabbage Aphids in Canolahttps://osunpk.com/wp-content/uploads/2016/04/cfn2vmnusaefmex.jpgCfN2vmNUsAEfMeXCabbage Aphids in Canola 22016-04-08T18:50:33+00:00monthlyhttps://osunpk.com/2016/02/25/wrong-then-wrong-now/2016-03-08T14:19:42+00:00monthlyhttps://osunpk.com/2016/02/07/herbicide-and-uan-tank-mixed-for-top-dress/https://osunpk.com/wp-content/uploads/2016/02/20091218-4215a.jpgNo till drill and ammonia oxide applicationNo till drill and ammonia oxide applicationhttps://osunpk.com/wp-content/uploads/2016/02/20091218-4274a.jpgNo till drill and ammonia oxide applicationNo till drill and ammonia oxide applicationhttps://osunpk.com/wp-content/uploads/2016/02/20091218-4274a-1.jpgNo till drill and ammonia oxide applicationNo till drill and ammonia oxide applicationhttps://osunpk.com/wp-content/uploads/2016/02/canopeo-processed.jpgCanopeo-processedImage processed by Canopeo to calculate % canopy coverage.https://osunpk.com/wp-content/uploads/2016/02/20090226-1862.jpg20090226-1862Higher % canopy coveragehttps://osunpk.com/wp-content/uploads/2016/02/20090226-1864.jpg20090226-1864https://osunpk.com/wp-content/uploads/2016/02/img_4646.jpgimg_4646Stream Barhttps://osunpk.com/wp-content/uploads/2016/02/canopeo-original.jpgCanopeo-originalPicture taken from phone.https://osunpk.com/wp-content/uploads/2016/02/20090226-1873.jpg20090226-1873Low % canopy coverage,https://osunpk.com/wp-content/uploads/2016/02/logo_128.pnglogo_128CANOPEO app available for iOS and Android2016-02-08T14:18:04+00:00monthlyhttps://osunpk.com/2015/09/10/canola-fertilizer-rates-when-skip-row-seeding/https://osunpk.com/wp-content/uploads/2015/09/salt-tolerance.jpgSalt ToleranceMaximum amount of salt that can be applied in furrow with canola seed. Application rate should be at or below this value. https://osunpk.com/wp-content/uploads/2015/09/phosphorus.jpgPhosphorusPhosphorus Fertilizer recommendations based upon Mehlich 3 P test reported as STP index (ppm * 2) https://osunpk.com/wp-content/uploads/2015/09/skip-row-11.jpgskip row 1Seed, colored blue, is placed in every other row but an equal amount of fertilizer, dark grey circles, is placed in every row.https://osunpk.com/wp-content/uploads/2015/09/skip-row-2.jpgSkip row 2Seed, colored blue, is placed in every other row but an fertilizer, dark grey circles, is placed in every row. In this scenario a high rate is placed in the row without seed. https://osunpk.com/wp-content/uploads/2015/09/skip-row-1.jpgskip row 1Seed, colored blue, is placed in every other row but an equal amount of fertilizer, dark grey circles, is placed in every row. 2015-09-11T04:05:38+00:00monthlyhttps://osunpk.com/2015/08/28/some-thoughts-on-pre-plant-nitrogen-and-a-little-outside-the-box-thinking/https://osunpk.com/wp-content/uploads/2015/08/nrs-applicators.pngNRS ApplicatorsJust a few of the applicators used for putting out N-Rich Strips. Not shown is NH3 applicator. https://osunpk.com/wp-content/uploads/2015/08/n_drill.jpgN_DrillJohn Deere double disk drill used to apply urea in-season. https://osunpk.com/wp-content/uploads/2015/08/wako_nh3.jpgWAKO_NH3WAKO NH3 applicator used for in-season application. 2022-04-27T16:32:51+00:00monthlyhttps://osunpk.com/2015/09/09/canola-planting-considerations/https://osunpk.com/wp-content/uploads/2015/09/herbicide-table1-e1441805109253.jpgHerbicide Table1Minimum interval between herbicide application and seeding canola. Refer to full herbicide labels for specific information as geography, pH, and rainfall may affect this interval. 2Rotation restriction can be overcome with use of a SURT canola variety. 3Rotation intervals depend on geography. 4Rotation interval depends on herbicide rate. https://osunpk.com/wp-content/uploads/2015/09/emergence.jpgEmergenceUneven canola emergence. Canola on left emerged later and did not have enough time to put on adequate growth (Photo courtesy of Josh Bushong) https://osunpk.com/wp-content/uploads/2015/09/app.jpgCanola Starter AppCanola Starter available on iOS and Android. For more information see http://www.dasnr.okstate.edu/apps.2015-09-09T14:40:04+00:00monthlyhttps://osunpk.com/2015/05/12/recent-weather-causing-corn-and-sorghum-injury-from-pre-emerge-herbicides/https://osunpk.com/wp-content/uploads/2015/05/atrazine-injury.jpgatrazine injuryhttps://osunpk.com/wp-content/uploads/2015/05/herb_carryover_f4b.jpgherb_carryover_F4bFigure . Buggy-whipping symptom from carryover of PPO herbicides to corn.via https://www.pioneer.com/home/site/us/agronomy/library/herbicide-carryover/2015-05-12T21:13:09+00:00monthlyhttps://osunpk.com/2015/05/07/variability-in-tissue-testingplant-analysis/2015-05-07T13:04:22+00:00monthlyhttps://osunpk.com/2015/05/01/sampling-for-ph-and-liming-in-continuous-no-till-fields/https://osunpk.com/wp-content/uploads/2015/05/mengel-and-west-purdue-univ1.pngMengel and West, Purdue Univ.Mengel and West, Purdue Univ.https://osunpk.com/wp-content/uploads/2015/05/mengel-and-west-purdue-univ.pngMengel and West, Purdue Univ.2015-05-04T14:20:51+00:00monthlyhttps://osunpk.com/2013/07/30/agriculture-app-for-the-ipad-and-iphone/2022-12-01T03:20:38+00:00monthlyhttps://osunpk.com/2013/09/19/nitrogen-rich-strips/https://osunpk.com/wp-content/uploads/2013/09/img_15351.jpgIMG_1535N-Rich Strip in no-till wheat near Hobart OK.https://osunpk.com/wp-content/uploads/2013/09/img_9635edit.jpgIMG_9635editCow Pox, Image courtesy Kaitlyn Nelson https://osunpk.com/wp-content/uploads/2013/09/img_18051.jpgOSU_appOk State N-Rich Applicatorhttps://osunpk.com/wp-content/uploads/2013/09/photo1.jpgVincent Vincent N-Rich Strip Applicator, Ponca City OKhttps://osunpk.com/wp-content/uploads/2013/09/img_1535.jpgIMG_1535https://osunpk.com/wp-content/uploads/2013/09/hollis-heath-beanland-3.jpgHollis, Heath Beanland 3https://osunpk.com/wp-content/uploads/2013/09/img_1805.jpgIMG_1805https://osunpk.com/wp-content/uploads/2013/09/photo.jpgphotohttps://osunpk.com/wp-content/uploads/2013/09/gard-n-rich-strip.jpgGard N-Rich StripGard N-Rich Strip Applicator, Fairview Ok2015-03-27T02:55:11+00:00monthlyhttps://osunpk.com/2014/01/03/ag-apps-updated/https://osunpk.com/wp-content/uploads/2014/01/calc1.jpgcalc1https://osunpk.com/wp-content/uploads/2014/01/clac2.jpgclac2https://osunpk.com/wp-content/uploads/2014/01/spray1.jpgspray1https://osunpk.com/wp-content/uploads/2014/01/spray2.jpgspray2https://osunpk.com/wp-content/uploads/2014/01/scout2.jpgScout2https://osunpk.com/wp-content/uploads/2014/01/seed.jpgseedhttps://osunpk.com/wp-content/uploads/2014/01/scout-1.jpgScout 1https://osunpk.com/wp-content/uploads/2014/01/scout-3.jpgScout 3https://osunpk.com/wp-content/uploads/2014/01/news11.jpgnews11https://osunpk.com/wp-content/uploads/2014/01/records.jpgrecords2015-03-27T02:54:48+00:00monthlyhttps://osunpk.com/2014/02/14/first-hollow-stem-advisor-available-on-mesonet/https://osunpk.com/wp-content/uploads/2014/02/hollowstem_early-proj14day.pnghollowstem_early.proj14dayhttps://osunpk.com/wp-content/uploads/2014/02/screen-shot-2014-02-14-at-1-01-50-pm.pngScreen Shot 2014-02-14 at 1.01.50 PMhttps://osunpk.com/wp-content/uploads/2014/02/hollowstem_early-current.pnghollowstem_early.current2015-03-27T02:54:37+00:00monthlyhttps://osunpk.com/2014/07/22/2013-wheat-and-canola-preplant-soil-test-results/https://osunpk.com/wp-content/uploads/2014/07/ph-graphs.jpgpH graphsFigures 3 and 4. 1)Range of soil pH levels for all samples submitted to SWFAL in 2013 under the wheat and canola crop codes. 2) Range of soil pH levels for all samples with pH<5.5.https://osunpk.com/wp-content/uploads/2014/07/aver2.jpg2011 and 2013 Soil Test SummariesTable 1 and 2. Summary from all samples submitted to SWFAL under the wheat and canola crop codes in 2001 and 2013.https://osunpk.com/wp-content/uploads/2014/07/ph.jpgVRT LImeFigure 5. Soil pH results from a 75 acre field that was grid soil sampled at a 2.5 ac resolution. https://osunpk.com/wp-content/uploads/2014/07/stp-graphs-withlabels.jpgSTP Graphs withlabelsFigures 1 and 2. 1)Range of soil test P levels (Mehlich 3) for all samples submitted to SWFAL in 2013 under the wheat and canola crop codes. 2) Range of Soil Test P level for all samples with STP<65.2015-03-27T02:53:19+00:00monthlyhttps://osunpk.com/2014/09/02/how-to-make-100000-in-a-day/https://osunpk.com/wp-content/uploads/2014/09/bo_kl_rcyaabiio.jpgSoil testing is not always easy, but it is time well spent. My high school shop teacher would have labeled me a "Primitive Pete" for this photo. 2015-03-27T02:52:41+00:00monthlyhttps://osunpk.com/2014/08/25/nutrient-products-stabilizers-enhancers-safeners-biologicals-and-so-on/https://osunpk.com/wp-content/uploads/2014/08/temp.jpgSoil Temp in summerSoil temperature for Stillwater OK under sod and bare soil conditions. Graph from www.Mesonet.org. https://osunpk.com/wp-content/uploads/2014/08/wet-soil.jpgWet SoilUrea placed on the surface of a wet soil under two temperature regimes. White text is the number of hours after application. https://osunpk.com/wp-content/uploads/2014/08/urease.jpgUrea conversion for ammoniumGraphic of Urea's conversion to plant available ammonium. https://osunpk.com/wp-content/uploads/2014/08/snake-oil.jpgsnake-oilhttps://osunpk.com/wp-content/uploads/2014/08/snake_oil_ad.pngsnake_oil_adhttps://osunpk.com/wp-content/uploads/2014/08/snake-oil_.jpg60-60168_MECHhttps://osunpk.com/wp-content/uploads/2014/08/dry-soil.jpgDry SoilUrea placed on dry soil, Top row: dry soil no water added, Bottom left, moisture added from subsurface, Bottom right : simulated rain fall event of 1/2". White text is the number of hours after application. 2015-03-27T02:52:03+00:00monthlyhttps://osunpk.com/2014/12/09/agriculture-apps-200-strong-and-growing/https://osunpk.com/wp-content/uploads/2014/12/ag-resources.jpgAg Resourceshttps://osunpk.com/wp-content/uploads/2014/12/seedselect.jpgSeedSelecthttps://osunpk.com/wp-content/uploads/2014/12/scouting_mapping.jpgScouting_Mappinghttps://osunpk.com/wp-content/uploads/2014/12/records.jpgRecordshttps://osunpk.com/wp-content/uploads/2014/12/pay-to-play.jpgPay To Playhttps://osunpk.com/wp-content/uploads/2014/12/osunpk.jpgOSUNPKhttps://osunpk.com/wp-content/uploads/2014/12/id-tools.jpgID Toolshttps://osunpk.com/wp-content/uploads/2014/12/fetilizer.jpgFetilizerhttps://osunpk.com/wp-content/uploads/2014/12/crop-tools.jpgCrop Toolshttps://osunpk.com/wp-content/uploads/2014/12/coverslide.jpgCoverslide2015-03-27T02:50:58+00:00monthlyhttps://osunpk.com/2015/01/06/time-to-start-topdressing-wheat-2/https://osunpk.com/wp-content/uploads/2015/01/img_4646.jpgStreamer nozzles provide uniform application of UAN in a wide variety of environmental conditions.https://osunpk.com/wp-content/uploads/2015/01/04-05-fld-near-red-rock-ok-3.jpgPoor nitrogen application can result in a streaked field. Some of the areas in this field were over fertilized while some were under fertilized resulting in wasted nitrogen and less than optimal crop yield.2015-03-27T02:50:18+00:00monthlyhttps://osunpk.com/2015/03/06/saline-and-sodic-seep-renovation-a-potential-positive-impact-of-drought/https://osunpk.com/wp-content/uploads/2015/03/2013.jpg2013https://osunpk.com/wp-content/uploads/2015/03/2011.jpg20112015-03-27T02:49:20+00:00monthlyhttps://osunpk.com/2015/03/20/results-from-1st-year-of-soybean-starter-work/https://osunpk.com/wp-content/uploads/2015/03/soybean-yr-1.pngSoybean yr 1Treatment Structure and rates for the 1st year of the Soybean Starter Study. https://osunpk.com/wp-content/uploads/2015/03/soil-test.pngSoil testSoil Test results from LCB and Perkins. https://osunpk.com/wp-content/uploads/2015/03/products.pngProductsList of fertilizers and products used. https://osunpk.com/wp-content/uploads/2015/03/photo-4.jpgPlanting at PerkinsImage taken while planting the Soybean Starter study at Perkins. A CO2 system was used to deliver starter fertilizers with seed. https://osunpk.com/wp-content/uploads/2015/03/perkins.pngPerkinsYield and Stand Counts from the Perkins 2014 Soybean Starter Study. https://osunpk.com/wp-content/uploads/2015/03/lcb.pngLCBYield and Stand counts from the 2014 LCB Soybean Starter Study. https://osunpk.com/wp-content/uploads/2015/03/check.jpgcheckThe Check plot at LCB were plants noticeably a bit smaller and more yellow than the neighbors with phosphorus. https://osunpk.com/wp-content/uploads/2015/03/8-4-14-lcb-waist-high.jpg8.4.14 LCB waist highSoybeans at LCB on August 4th. 2015-03-20T21:46:28+00:00monthlyhttps://osunpk.com/2015/03/18/4-keys-to-reaching-grain-sorghums-yield-potential/https://osunpk.com/wp-content/uploads/2015/03/corn-inner-1-30-09flat.jpgCorn inner 1-30-09flatNitrogen, Phosphorus and Potassium Recommendations for corn and sorghum production. Adapted from the Field guide and PeteSheet available at www.npk.okstate.eduhttps://osunpk.com/wp-content/uploads/2015/03/blackwell-4-yrs.jpegBlackwell 4 yrsAverage 4 inch soil temps at Blackwell for 2010, 2011, 2012, 2013, and 2014 for under sod. Data from the Mesonet.org. https://osunpk.com/wp-content/uploads/2015/03/ricks-timeline.pngRicks TimelineTimeline for optimum planting date (N of I-40) and proper maturity groups. Developed by Rick Kochenower (Chromatin seed)https://osunpk.com/wp-content/uploads/2015/03/cherokee-bare-sod.jpegCherokee bare-sodLong term average 4 inch soil temps at Cherokee for bare soil and under sod. Data from the Mesonet.org. https://osunpk.com/wp-content/uploads/2015/03/blackwell-bare-sod.jpegBlackwell bare-sodLong term average 4 inch soil temps at Blackwell for bare soil and under sod. Data from the Mesonet.org. https://osunpk.com/wp-content/uploads/2015/03/ave-soil-temp-bare.jpegAve soil temp bareLong term average 4 inch soil temps from Blackwell, Apache, Cherokee, and Vinita for bare soil. Data from the Mesonet.org. https://osunpk.com/wp-content/uploads/2015/03/apache-bare-sod.jpegApache bare-sodLong term average 4 inch soil temps at Apache for bare soil and under sod. Data from the Mesonet.org. 2015-03-19T00:16:57+00:00monthlyhttps://osunpk.com/2014/06/30/2014-harvest-has-wrapped-up/https://osunpk.com/wp-content/uploads/2014/06/photo-5.jpgDodging RainThis harvest was spent watching the radar and going where the weather allowed.https://osunpk.com/wp-content/uploads/2014/06/photo-4.jpgModificationEven a new machine needs a few in field "Modifications"https://osunpk.com/wp-content/uploads/2014/06/photo-31.jpgphoto 3https://osunpk.com/wp-content/uploads/2014/06/photo-22.jpgDifferencesIn this you can see the impact of fertility on freeze damage. The dark plots survived the freeze, the light did not and were full of smaller tiller heads. In the end no major yield differences. https://osunpk.com/wp-content/uploads/2014/06/photo-12.jpgViewThe view from the driver seat of the Massey 8XP, with the Harvest Master on the right. https://osunpk.com/wp-content/uploads/2014/06/photo-21.jpgResidueEven with a 5 ft header residue management is important. https://osunpk.com/wp-content/uploads/2014/06/photo-11.jpgphoto 1https://osunpk.com/wp-content/uploads/2014/06/photo-3.jpgLate NightsTo beat the rains all of us at OSU ran late nights and weekends. https://osunpk.com/wp-content/uploads/2014/06/photo-2.jpgNew ExperiencesWhen possible we like to let students get as much experience as possible. In this a Brazilian intern Luciano is learning to run the 8XP. https://osunpk.com/wp-content/uploads/2014/06/photo-1.jpgClean up While all plots are cut with the 8XP, for cleanup we borrowed a few Gleaners when available. 2014-06-30T20:52:23+00:00monthlyhttps://osunpk.com/2014/06/03/i-am-in-extension-and-i-am-just-borrowing-your-idea/https://osunpk.com/wp-content/uploads/2014/06/n-cycle.jpgN-CycleNitrogen Cycle Pete's Sheethttps://osunpk.com/wp-content/uploads/2014/06/door.jpgdoorOffice door with the Pete's Sheets tray. Always free to a good home. https://osunpk.com/wp-content/uploads/2014/06/dos_donts_front-very.jpgDos_Donts_front veryCover of the first Pete's Sheets produced. https://osunpk.com/wp-content/uploads/2014/06/photo1-1.jpgphoto1.1Plant Food Uptake (PPI)2014-06-04T03:11:12+00:00monthlyhttps://osunpk.com/2014/01/01/freeze-injury/2014-01-10T20:37:50+00:00monthlyhttps://osunpk.com/2014/01/09/time-to-start-topdressing-wheat/2014-01-10T20:37:10+00:00monthlyhttps://osunpk.com/2013/06/28/response-to-npks-strips-across-oklahoma/https://osunpk.com/wp-content/uploads/2013/06/w-of-alva-6-13-13.jpgW of Alva 6-13-13N-Rich strip very evident in field west of Alva. N-Rich 70 bu/ac Farmer Practice 38 bu/ac.https://osunpk.com/wp-content/uploads/2013/06/npks.pngnpksNPKS applicator. Gandy boxes hold each fertilizer and a pto driven fan blew the fertilizer down the boom.2013-08-05T19:38:45+00:00monthlyhttps://osunpk.com/2013/06/19/placing-fertilizer-with-canola-at-planting-has-positives-and-negatives/https://osunpk.com/wp-content/uploads/2013/06/rowspace-n1.pngrowspace NEquivalent amount of N based on 15" row spacing. https://osunpk.com/wp-content/uploads/2013/06/dap-standexp1.pngDAP.StandExpImpact of DAP (18-46-0) placed in-row on canola stand in terms of lbs N ac-1. 2013-06-19T19:37:50+00:00monthlyhttps://osunpk.com/about/2019-08-30T12:41:09+00:00weekly0.6https://osunpk.comdaily1.02026-04-03T18:23:58+00:00