1. Addressing Soil Variability using air seeders
Jeff Biggerstaff

2. Introduction How to determine soil variability How an air seeder works
How to use an air seeder for variable rate application
Advantages of addressing variability

3. How to determine variability
Yield Maps
Optical Sensors (i.e. Greenseeker)
Treatment Trials (N-Rich Strip)
Soil Sampling

4. How an air seeder works
Fan blows seed dropped by air cart to the seeder
Meter rollers drop seeds into seed tubes to be blown to seeder
Ground drive and transmission adjust the rate of meter roller

5. How an air seeder works

6. How to use an air seeder to do variable rate applications

7. Advantages/Disadvantages
Prevents over applying inputs in areas which do not need them.
Can be used to treat problem spots in fields to increase yields
Potentially addresses future problems associated with input efficiency
Expensive start up

8. Questions?