posted on April 14, 2008 09:58
Darryl Warncke...With the significant increases in costs of phosphate and potash fertilizers since last season and with tight supplies, some reflection on recommended rates is in order. MSU’s recommendations for phosphate (P2O5) and potash (K2O) are based on the buildup and maintenance approach. In this approach, the most important soil test value is the critical level (CL). On average, when the soil test value is at the CL, there is sufficient P or K available in the soil to produce top quality produce and near maximum yield.
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