Fertilizers may be important tools in crop production, but when applied in excess they can inadvertently support pests and impair water quality. For soil fertility, have your soil tested regularly to identify and set nutrient management goals. Legume cover crops can provide supplemental nitrogen and grass cover crops can take up soil nitrogen. Manures and composts can provide much-needed nutrients in their organic forms. Organic amendments like cover crop residues, manures and composts slowly release plant-available nutrients that feed the crop and soil biology, and build soil organic matter. SARE’s Building Soils for Better Crops provides an in-depth discussion on producing resilient crops by managing soil health and nutrients.