Using nitrogen fertilizer can result in substantial economic return for farmers, but when nitrogen inputs exceed crop needs, excessive amounts of nitrate can enter either ground or surface water. Selecting the right nitrogen source can help growers produce crops in a more profitable and environmentally-friendly way, says the University of Minnesota.

A look at the nitrogen cycle can help growers understand the advantages and disadvantages of particular nitrogen fertilizer sources.

With rain in the forecast for many areas, nitrogen management is becoming extremely important. There are some opportunities, and challenges, for ensuring the corn has enough to finish the season.

Penn State Extension says now is the time think about topdressing wheat, and what to consider in regards to timing and materials.