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Precision Ag in Oklahoma Wheat Production. By Brennan Leighton. The early days. Conventional till Plow the prairie Drought = Crop Failure Bare soil + wind = Dust Bowl. No till. Made possible by the invention of herbicides Weed control in fallow system Weedseeker - PowerPoint PPT Presentation
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Precision Ag in Oklahoma Wheat Production
By Brennan Leighton
The early days
• Conventional till• Plow the prairie • Drought = Crop Failure • Bare soil + wind = Dust Bowl
No till
• Made possible by the invention of herbicides• Weed control in fallow system • Weedseeker • GPS, GIS, Auto steer, Overlapping swath
control
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.
How much N to apply on N rich strip?Grain Yield (Bu/ac) N Rich Strip (lbs/ac actual N)
20 50
30 75
40 100
50 125
60 150
70 175
• N Ramp
Nitrogen Rich Strip
Sensor-Based Nitrogen Rate Calculator
• http://www.soiltesting.okstate.edu/SBNRC/SBNRC.php
• Can also be used for predicting yield, profit, loss
GreenSeeker on the History Channel
• http://nue.okstate.edu/GreenSeeker_Results.htm
Precision seedingP2070 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
Seed variety
• Hybrid seed varietys can be very important for maximum yields and drought tolerance
Combine technologies
• Auto steer • GPS, GIS• Yield monitors – Mass flow sensors– Moisture sensors– GPS– Ground speed sensor– Programmed harvest width
Yield maps
Questions?