1. Precision Ag in Oklahoma Wheat Production By Brennan Leighton

2. The early days Conventional till Plow the prairie Drought = Crop Failure Bare soil + wind = Dust Bowl

3. No till Made possible by the invention of herbicides Weed control in fallow system Weedseeker GPS, GIS, Auto steer, Overlapping swath control

4. Soil testing Composite 15-20 six inch cores mixed together per management zone Send to SWFAL Correct Ph with lime Fertilize P and K according to % sufficiency Nitrogen need is determined by expected yield Apply ½ Nitrogen pre-plant and ½ to be determined mid season using Greenseeker and N rich strip or N ramp Can use Veris rig to map soil EC, moisture content, and soil texture.

5. How much N to apply on N rich strip? Grain Yield (Bu/ac)N Rich Strip (lbs/ac actual N) 2050 3075 40100 50125 60150 70175

7. N Ramp

8. Nitrogen Rich Strip

9. Sensor-Based Nitrogen Rate Calculator http://www.soiltesting.okstate.edu/SBNRC/SB NRC.php http://www.soiltesting.okstate.edu/SBNRC/SB NRC.php Can also be used for predicting yield, profit, loss

10. GreenSeeker on the History Channel http://nue.okstate.edu/GreenSeeker_Results. htm http://nue.okstate.edu/GreenSeeker_Results. htm

11. Precision seeding P2070 Precision Hoe Drill Covers 70 feet Can adjust individual openers seeding depth by 1/8in increments from 0-2in Can monitor down pressure Can maintain fertilizer/seed separation 1 7/8 inch lateral separation and 7/8 in vertical separation with dual shoot openers

12. Seed variety Hybrid seed varietys can be very important for maximum yields and drought tolerance

13. Combine technologies Auto steer GPS, GIS Yield monitors – Mass flow sensors – Moisture sensors – GPS – Ground speed sensor – Programmed harvest width

14. Yield maps

15. Questions?