With excess rain occurring throughout the Midwest, Iowa State University Extension explains what impacts nitrogen loss from fall applications.

Winter finally seems to be coming to an end, so it's time to start topdressing nitrogen (N) on the winter wheat crop. With good soil moisture in many areas of the state, and some fairly small wheat in many fields due to late planting, there are some key elements that need to be considered when deciding on the exact program you plan to use. These include: timing, N source, application method and N rate.