Aerate row crops every other row. Skip rows behind tractor tires. Avoid surface application of total nitrogen amount. Sidedress fertilizer into moisture regardless of application tool. The most efficient sidedress application in a dry period appears to be with a deep aeration tool.
Potassium is a key player in helping plants to overcome moisture stress.
Make sure you have adequate K levels in your soil and available to the crop. Fine lime will tend to dehydrate plant roots. Apply at rates of 200 pounds per acre or less if a spring application is necessary. Calcium improves cell wall flexibility and permeability, it is an essential ingredient in plant enzyme systems, and aids the plant's immune system. Liquid applications of highly available sources are most efficient and effective.