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North Central Illinois | The key in an organic system is to have a maximum of legume cash crops if manure is used to supply the bulk of the N for non legume crops.
Using a legume green manure ahead of corn, and cutting back manure applications should help. I have the "advantage" of mostly farming ground that hasn't seen commercial fertilizer since at least the 70's, so excess P application is actually helpful for a while yet.
Alfalfa as a cash crop should address your problem well. And for me, the year I plow it down, it supplies the majority of the N for a 200 bushel corn crop. | |
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Getting some high phosphorous readings.......need to start fixing......
