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Precision Nutrient Management in Oklahoma: Maximizing Yields through Optimal Nitrogen Application

Explore the science behind precision nutrient management in Oklahoma for maximizing crop yields through optimal nitrogen application. Discover key concepts such as nitrogen's role in plant health, nitrogen loss prevention strategies, and the importance of timing and rate accuracy. Learn about practical applications like the N-Rich Strip method and sensor-based technologies for improved yield predictions. Join Brian Arnall in this insightful journey to elevate your agricultural practices.

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Precision Nutrient Management in Oklahoma: Maximizing Yields through Optimal Nitrogen Application

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  1. Experience Oklahoma! Brian Arnall Precision Nutrient Management

  2. Nitrogen in the Plant • Part of • Amino Acids: Building blocks of proteins • Enzymes: responsible for all biological process • Nucleic Acids • Cholorphyll • Needed for Carbohydrate use • Increases root growth

  3. N that is not used is lost Raun and Johnson, Agron J. 91:357-363

  4. Nitrogen is mobile…..

  5. Nitrogen is mobile…..

  6. Application

  7. Application

  8. “After the FACT” N Rate required for “MAX Yields” Ranged from 0 to 140 lbs N/ac

  9. 4 R’s Right Source Right Place Right Rate Right Time IPNI: International Plant Nutrition Institute

  10. Reference Strips • Are Very Visual.. • BMP? • Risk Aversion? • Sales and Service?

  11. Reference Strips • What: A high rate of N applied in, across, through, over or under each and every field • How Much: Minimum of 50 lbs N above preplant rate. • How and Where: 10 to 100 ft wide, anywhere representative. • When: Winter crops; before or after sowing (1+ months), Summer crops; before or immediately after planting.

  12. Optical Sensors • Numerical, describe the crops BIOMASS. • DOES NOT really WORK WITH OUT A REFERENCE.......... • Multiple options • Companies • Resolution

  13. Yield Prediction SBNRC (YP0*RI =YPN) 100 Pre (100 lbs N/ac applied preplant)

  14. Optical Sensors

  15. Success Stories • The N-Rich Strip • Approx 500,000 acres. • Sensor Based N Rates (Agron behind it) • Winter Wheat, Sorghum, Corn, Canola, Cotton • New Crops • Winter Canola 120,000 acres • Sesame 50,000 acres • Partners in Research

  16. Commercializing • Use of the N-Rich strip is becoming very commercial. • 1 consultant 1st year12,000 Ha

  17. Thank you!!! www.extensionnews.okstate.edu Brian Arnall b.arnall@okstate.edu Presentation available @ www.npk.okstate.edu Twitter: @OSU_NPKFacebook Fan Pagewww.facebook.com/osunpk YouTube Channel: OSUNPK

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