Fertilizer management in Minnesota concerns itself mainly with the big three of fertilizer management - Nitrogen, Phosphorous and Potassium. These nutrients work to improve both crop yield and quality. There are other soil nutrients that have little if any effect on production and therefore can be classified as micronutrients. However, we do know, through research, that there are some micronutrients that must be present for profitable crop production. So it is important to review and summarize some of these elements to determine which ones to include in our overall soil nutrient package.