List and explain the methods of fertilizer application. List and explain the different amendments used to increase soil organic matter content. They consist of sweet clovers, soybean, sudan grass, peas, or oats. Green manure crops are tilled under before they mature. Their high water content speeds decomposition.
Green manure are an excellent source of nitrogen.
Chicken manure is higher in nitrogen than other manure, whereas sheep manure is a better source of potassium. Cow and horse manure contains less nitrogen and potassium than sheep manure. Most animal manure is low in phosphorus. Fresh manure applied too close to planting time can burn plants due to rapid decomposition and high ammonia content. Fresh manure is bulky, and it can interfere with plowing and cultivation.