Rolla, ND | Roger Cochran - 10/3/2007 12:28
Here's the deal.
1. I have the yield map from corn harvest.
2. I have the soil test results taken after corn harvest.
3. I know how much fertilizer was applied in the spring.
What would be wrong with using the yield map to create a VRT prescription based upon the yield goals for wheat/double-crop soybeans and the actual removed by the corn. Any thoughts appreciated.
Some questions.
Which fertilizers are you talking about?
Are you thinking if you say applied 80 lbs of P2O5 and removed 60 lbs in a particular spot that you would credit 20 as far as the wheat application?
Or do you mean basically set up the variable rate using the corn as a model so say the area of 200 bushel corn you might aim for 100 bushel wheat and an area of 100 bushel corn you might aim for 50 bushel wheat?
When you say soil test. What exactly do you mean? Topsoil test? P,K, OM, 2 foot nitrate? Is it one test for field, grid, zone?
What would nitrogen recommendations normally be based on, if we are talking nitrogen?
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