Soil samples should be taken to a depth of 12 inches. Apply correct type and rate of fertilizers based on soil test. Types of fertilizers. Organic fertilizer Manure, compost, cottonseed meal, blood meal, and bone meal. Organic fertilizers supply necessary plant nutrients while improving the soil structure, aeration, and water-holding capacity.
Materials vary widely in their nutrient contents.
Chemically manufactured with exact nutrient content. Easy to apply, need relatively small amounts. Reduces loss of nutrients into the environment by applying at exact rates. Rates of fertilizer should provide nutrients only up to the level needed by the plants being grown. Time fertilizer applications correctly.