Interest in plant tissue testing as a tool to help diagnose the plant nutrient status of crops has increased greatly in the past few years. Results of tissue testing along with a soil test can provide a valuable guide to more efficient crop production. Soil tests provide a good estimate of lime and general fertilizer needs. By adding tissue analysis data, the user is able to better evaluate fertilizer and management practices more accurately by providing a thorough nutritional view of the crop. Several key uses of plant analysis include: evaluation of fertilizer efficiency, determination of availability of elements for which reliable soil tests are not available, and the ability to evaluate the interaction among plant nutrients.
Soil Science Extension
University of Wisconsin Madison