One approach is to apply organic materials to supply part of the nutrient requirements and add the rest of the needed nutrients with manufactured chemical fertilizers. All nutrients must be in the ionic form to be dissolved in soil water and usable by plants, so organic fertilizer materials must decompose before plants can use the nutrients. In terms of plant use, it does not make any difference whether the nutrients come from organic or manufactured forms of fertilizer. Both are changed to the same form in the soil. Manure Applying manure to soils for vegetable production is a good practice.
Manure supplies part of the needed soil nutrients and provides added organic matter.
Table III gives suggested rates of manure application. These rates supply part of the nitrogen needed and most other nutrient needs. Avoid using more than the amounts given in Table III . Applying too much manure results in a soil nutrient content that is more than plants can use, and in excessive soluble salts that can damage plant roots. Rotted or composted manure is preferred to minimize odor and reduce the risk of applying some weed seeds commonly found in uncomposted manure.