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Project Details:
Justification
Objective
Methodology
We can achieve high corn and soybean yield with low soil test P if P is applied as recommended with a P sufficiency based approach. However, research findings in Minnesota show an advantage to having high soil test P in years with slow to warm soils. The relevance of these findings may vary with latitude and length of growing season. It does raise concern that sufficiency based P recommendations may not be appropriate for high yields in some situations. The slow to warm soil effect may be greater with no-till and especially no-till continuous corn, and with earlier planting.
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