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Precision Nutrient Management

Precision Nutrient Management. Brian Arnall Department of Plant and Soil Sciences Oklahoma State University. Precision Ag Class. Wheat Lots of $ Sprayer, No-till/Air seeder, GPS, Yield Monitor, Combine, Wheat a little $ Grid, Veris , GPS Yield Monitor, Nrich and GS Corn Lots of $

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Precision Nutrient Management

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  1. Precision Nutrient Management Brian ArnallDepartment of Plant and Soil SciencesOklahoma State University

  2. Precision Ag Class • Wheat Lots of $ • Sprayer, No-till/Air seeder, GPS, Yield Monitor, Combine, • Wheat a little $ • Grid, Veris, GPS Yield Monitor, Nrich and GS • Corn Lots of $ • Planter, Strip till, Zones • Corn a little $ • Planter upgrade, Gird, GS, Zone.

  3. Variable Rate Tech • Does VRT fertilizer (not lime) Result in • More uniform yield across field • More variable yield across field

  4. Precision Nutrient Management • Land • Soil type, Slope, H20 Movement • Soil • Soil sample • Composite, Zone, Grid • Soil EC • Soil color • Plant • Tissue • Sensor • Yield

  5. To Each His Own • What is the problem • What is the goal • Time and Money Investment

  6. Independence of Variables • If you want to fix everything • Don’t chase after one thing. • Yield Monitor data for • Phosphorus Potassium Lime • Soils data for • Nitrogen and Sulfur • N and S (mobile) are yield based • P and K (immobile) are soil test based • Lime is Buffer Index based

  7. Determining the Variable • Using 1 factor to determine other unrelated factors P P K Elevation

  8. Buffer Index

  9. Phosphorus

  10. Soils Sampling

  11. Soil Sampling

  12. Sensors

  13. Yield Monitor

  14. Apps • I have 29 Ag apps on my I-Pad • 27 were free • I use 6 regularly • Identification • weed and nutrient • Easy to use Calculators • Spray and fertilizer • John Deere, Pioneer, Monsanto, Hew Holland, ectectectect. Customer based

  15. First VRT • VRT Lime due to cost/acre and variability

  16. Summary • Now the reasons and goals • Understand limitations • Don’t have to dive in Head first

  17. Thank you!!! www.extensionnews.okstate.edu Brian Arnall 373 Ag Hall 405-744-1722 b.arnall@okstate.edu Presentation available @ www.npk.okstate.edu Twitter: @OSU_NPK YouTube Channel: OSUNPK

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