Winter came early last fall and perhaps you couldn’t make planned phosphorus and potassium applications. And, you couldn’t make applications during winter because of heavy snow cover. Now soils are wet and there is little time until corn planting begins. Also, fertilizers are in short supply and at high prices. So what should you do? There are a few viable options depending mainly on soil-test values and the particular crop. Most likely there is time for application if the crop is soybean or pasture, because either you applied the needed P and K before last year’s corn or have a few more days to fertilize this spring. You may have a tough situation for other crops such as oats, corn, or spring wheat, especially for oats and spring wheat because you should already have them planted.
Iowa State University
Mallarino, Antonio P., "You Couldn’t Apply Phosphorus and Potassium Last Fall and Now It’s Too Wet" (2008). Integrated Crop Management News. 970.
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