What fertilizer is best for sweet corn?

There is no way to reasonably answer this question without knowing the cropping history of the field, the soil types present, how much and what kind of fertilizer has been added in the last several years, and preferably the results of a comprehensive soil test.

However, there is information available to tell you how much of various nutrients are removed from the soil by the growing crop. If you already have information on the cropping history and other variables, you can make a reasonable plan for fertilization based on these calculations. See the related link below.