Soil nitrate tests are an effective method for identifying optimum nitrogen (N) rates for corn in several cropping systems commonly used in Wisconsin (Bundy and Andraski, 1995). Use of these tests often allows a reduction in the N rate applied for corn and thereby provides economic benefits to producers as well as reduced potential for loss of nitrate to groundwater. The success of this approach has stimulated producer’s interest in using similar methods for other nitrogendemanding cereal crops such as wheat. Diagnostic tests for predicting wheat N requirements have been evaluated in the eastern U.S. and in the Great Plains wheat producing areas. The substantial soil and climatic differences between these regions and Wisconsin prevent direct transfer of N test methods for use in humid northern climates where little or no evaluation of N tests for predicting wheat N needs has been done.