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Optimizing Nitrogen Fertilizer Through Use of Optical Sensors

Optimizing Nitrogen Fertilizer Through Use of Optical Sensors. Brian Arnall Oklahoma State University b.arnall@okstate.edu. Why Change. Notill = More Organic Matter Organic Matter is a Major Driver of N Cycle New crops, new rooting structure Higher Yields?.

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Optimizing Nitrogen Fertilizer Through Use of Optical Sensors

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  1. Optimizing Nitrogen Fertilizer Through Use of Optical Sensors Brian Arnall Oklahoma State University b.arnall@okstate.edu

  2. Why Change • Notill = More Organic Matter • Organic Matter is a Major Driver of N Cycle • New crops, new rooting structure • Higher Yields?

  3. Sensor Based Nitrogen Rate Calculator? What is needed for a Yield Prediction Model Response Index Nitrogen Removal The calculation looks like: N Rate = {(Potential Yield Farmer Practice * RI)- YPFP}* N in Grain/NUE

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

  5. Reference Strips What: A high rate of N applied in, across, through, over or under each and every field How Much: Minimum of 125% of yield goal recommended rate, this includes residual and preplant. 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.

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

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

  8. Optical Sensors

  9. Sensors and No-till There is no cookie cutter recipe No Text Book Learn from others Mistakes Adopt to your farm, soil, machinery, management and mindset. Do not go 100% the first year, but put out 100% of the strips. Art

  10. Large Scale Research Apply N-rich strip and ramp The applicator applies an N-rich strip (approx 179.2 Kg/Ha N) on the left 6 ft of boom. The right 6 ft of the boom applies an N-ramp.

  11. Sensing Sense the strips prior to hollow stem

  12. Applying top-dress

  13. Harvest

  14. Results Leonard Ottawa Comin-till Corn

  15. Results Rendel Ottawa CoNo-till Sunflower

  16. Results Johnson Ottawa CoNo-till SoybeanSown Nov.

  17. Results Red Barn Barber Co. KsCont Wheat

  18. Results Linley Barber Co. KsCont Wheat

  19. Results Sipel Barber Co. KsCont Wheat

  20. Results Mach Canadian CoCont Wheat

  21. Results Bornemann Canadian CoCont Wheat

  22. Results

  23. 2009 Corn Trials

  24. Thank you!!! Email Jeff.Edwards@okstate.eduChad.Godsey@okstate.eduwith a request to be added to the list.

  25. Sensor Based N Fertilizer Recommendation Summary 2006-2008

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