Dry conditions this summer in some parts of Iowa will result in low and variable crop yield. Low or variable crop growth and yield significantly affect phosphorus (P) and potassium (K) uptake and removal with harvest. If dry conditions continue into the fall soil sampling season soil-test P, K, and pH results also may be affected complicating test interpretations.
Iowa State University
Mallarino, Antonio and Sawyer, John, "Phosphorus, Potassium, and pH Management Following Drought Affected Crops" (2017). Integrated Crop Management News. 2451.
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