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Biannual surface application of potassium (K) fertilizer prior to corn (Zea mays L.) in a corn-soybean (Glycine max (L.) Merr.) rotation has been common in conventional-till crop production in North America; however, whether this traditional K management practice is effective for soybean when both corn and soybean are grown with conservation tillage is largely unknown. This study evaluated the residual...
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