1. N Ramp Project Robbie Peterson Oklahoma State University Plant and Soil Sciences robbie.peterson@okstate.edu

2. Fall 2008 Farm Visits Farm Visits Educational events Educational events Southern Plant Nutrient Conference Southern Plant Nutrient Conference OSU career fair OSU career fair Deer Workshop Deer Workshop Wheat-Millet project Wheat-Millet project Pre-plant and planting Pre-plant and planting Harvest and data collection Harvest and data collection Fall Management Meeting Fall Management Meeting

3. What is N Ramp?  Nitrogen fertilizer  Ramp Calibrated Strip (RCS)  Variable rate sprayer

4. “The Sprayer” 100 gallon fertilizer tank 100 gallon fertilizer tank 35 gallon water tank 35 gallon water tank 5 hp motor 5 hp motor Centrifugal pump Centrifugal pump 12’ fold down boom 12’ fold down boom 10 nozzle points 10 nozzle points Three different nozzles Three different nozzles

5. “Sprayer cont.” 3 Solenoids 3 Solenoids 3 Different Nozzles 3 Different Nozzles Increase in Pressure Increase in Pressure Decrease in Pressure Decrease in Pressure 12 Rates 12 Rates

6. “The Brains” Two control boxes Two control boxes Trailer Box Trailer Box Solenoids Solenoids Pressure Pressure Rate of spray Rate of spray Vehicle Box Vehicle Box Settings Settings GPS GPS

7. Settings 4 Programs 4 Programs GPS GPS Rinse Rinse Flat rate Flat rate N Rich strip N Rich strip Ramp Ramp Calibration Calibration 28-0-0 28-0-0

8. Ramp Settings 15” Spacing 15” Spacing All ten nozzle sets All ten nozzle sets 300lb/ac – 30lb/ac 300lb/ac – 30lb/ac 12 Rates 12 Rates 30” Spacing 30” Spacing 5 Nozzle sets 5 Nozzle sets 150lb/ac – 15lb/ac 150lb/ac – 15lb/ac 12 Rates 12 Rates Rate Length Rate Length 15’ – 50’ increments 180’ – 600’ Ramps GPS start GPS start N 33-55.7549’ W 97-23.2709’ GPS stop GPS stop N 33-55.8354’ W 97-23.2768’

9. Flat Rate (N Rich strip) 15” Spacing 15” Spacing 30” Spacing 30” Spacing Rate Rate 15” (300-30lb/ac) 15” (300-30lb/ac) 30” (150-15lb/ac) 30” (150-15lb/ac) Length Length 100ft-1,000ft 25ft increments GPS GPS Start Stop

10. Cooperators Contact cooperators Contact cooperators Pitched the project Pitched the project Got the Okay Got the Okay Winter pastures Winter pastures Farm Maps Farm Maps Locations Locations Soil maps Soil maps

11. Time to Spray Found the Field Found the Field Soil Survey map Soil Survey map Pick Landmarks Pick Landmarks Recorded Data into Spread Sheet Recorded Data into Spread Sheet Date and time Date and time Field Field Treatment rate and length Treatment rate and length GPS GPS Landmarks Landmarks CONTINUED TO SPRAY!!! CONTINUED TO SPRAY!!!

12. Soil Samples! Every Field –15 Cores –0-6 inches –Around the ramps

13. Totals 13 Cooperators 13 Cooperators 43 Fields 43 Fields 82 Ramps 82 Ramps 30 N Rich strips 30 N Rich strips 112 Strips 112 Strips

14. Binder Cooperator binder Maps Soil tests Ours Theirs s s oooo iiii llll t t t t eeee ssss tttt s s s s pppp rrrr eeee aaaa dddd s s s s hhhh eeee eeee tttt.... xxxx llll ssss Field spread sheets

15. Field Spread Sheet Ramp data Ramp data Date and time Date and time Field Field Treatment rate and length Treatment rate and length Landmarks Landmarks GPS GPS Field data Field data Planting date Seeding rate Variety Fertilizer applied RCS Cooperators.xlsm RCS Cooperators.xlsm

16. Why Apply N Ramps? Mid-Season Nitrogen Mid-Season Nitrogen Visual Visual Sensor based (Green Seeker) Sensor based (Green Seeker) Fertilizer Efficiency Fertilizer Efficiency Save $$ Save $$

17. N-Rich Green Seeker Green Seeker Senses plant greenness Senses plant greenness NDVI NDVI Calculates Nitrogen use efficiency Calculates Nitrogen use efficiency N-Rich N-Rich Farmers practice Farmers practice http://nue.okstate.edu/ http://nue.okstate.edu/ http://nue.okstate.edu/

18. Sensing Drought conditions Drought conditions –Poor growing –Visual differences NEED RAIN NEED RAIN

19. Sensing Green Seeker Green Seeker 3 Cooperators Keith Varner 3 fields Jim Murphy 3 fields Stan Kimble 4 fields

20. Keith Varner NDVI Readings Soil test Field Farmer practice N Rich strip N Rate recommendation # N Hoover0.540.61020 Brittain0.470.64080 Hefner0.570.65029

21. Jim Murphy NDVI Readings Soil test Field Farmer practice N Rich strip N Rate Recommendation # N Herbold0.620.74091 E. Delashmut 0.810.83031 W. Delashmut 0.710.7901

22. Stan Kimbell NDVI Readings Soil Test Field Farmer practice N Rich strip N Rate Recommendation#N Loving #1 0.380.40011 Black #1 0.250.3207 Black #3 0.250.3207 Black #4 0.220.3007

23. Goals Objective? Objective? Effectiveness of N Ramp and N Rich Effectiveness of N Ramp and N Rich

24. Special Thanks Noble Foundation and Ag Division Noble Foundation and Ag Division Jim Johnson Jim Johnson NF Teams and Team Assistants NF Teams and Team Assistants Jagadeesh Mosali Jagadeesh Mosali Shawn Norton Shawn Norton Rodney Pierce, Waylon Bamburg, Brian Preston Rodney Pierce, Waylon Bamburg, Brian Preston Tresa Runyan Tresa Runyan Billy Phelps Billy Phelps Toni O’Brien Toni O’Brien

25. QUESTIONS? GO POKES!