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a) Green manures Green manures are prepared from green plants such as crops mainly grown for this purpose are cut before flowering, chopped into the smaller pieces and ploughed into the soil where they decompose and rot in the soil. The plants used to prepare green manures must have a lot of leaves i.e. they must be leafy and they include the following: maize, sorghum, nappier grass and plants that are leguminous e.g. cowpeas, beans, sunflower and lucern which are able to grow quickly, rot quickly and contain a high amount of nitrogen.
b) Farm/ animal manures (FYM) This type of manure is made from animal waste such as urine, dung, poultry dropping and animal beddings e.g. layers of grass, wood shavings or sawdust are a good source of plant nutrient since they add organic matter to the soil. These type manures should not be exposed to the direct rain or sunshine because this way they lose the nutrients.
c) Compost manure This is a mixture of plants i.e. decayed leaves and peeling from vegetables from kitchen before and leftovers and animal waste. This manure is used to improve soil fertility preparation of compost manure is by pilling plant materials in heap or pit in areas which are not wet. The compost heap is decomposed by activities of bacteria.
Fast decomposition is encouraged by the following:
• Keeping the heap moist but not wet
• Adding layer of decayed materials rich in bacteria e.g. farm yard manure
• Adding a layer of top soil to introduce decomposers in the heap
• Covering the heap at least for three or four weeks so that air can circulate freely.
raphael answered the question on October 9, 2018 at 04:56
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