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By A. K. Singh

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Over this cow dung slurry and a thin layer of soil are spread. As these materials are highly fibrous, microorganisms like Pleurotus, Aspergillus, or Trichoderma should be mixed with cow dung slurry for early decomposition. The second layer should be of dry grasses, weeds and crop residues and filled to a height of 25 to 30 cm. After these materials are filled, water in sufficient quantity is added to make these materials wet. Over this layer, cow dung slurry with microorganism is applied as explained earlier.

Costs of Production Vermicompostingcould be taken up on any scale starting from 10 tonnes per annum (TPA) to 1000 TPA and above. As the production is proportional to the vermi-bed space, it is advantageous to start with less capacities and later expands the unit after gaining production experience and developing assured market for the product. 3 m) is estimated to produce vermicompostof 200 TPA over 46 Vermicomposting 5 cycles/ crops of 75 days each annually. 4m. The requirement of materials and implements, machinery are listed below: (a) Implements and machinery for 200 TPA vermicompostunit SI.

Washout of soluble nutrients from stored dung and compost can be prevented by proper sheltering and storage. Dung or compost is often stored in pits where water collects during the rainy season. Nitrogen gets lost through leaching (if the bottom of the pit is permeable) or through volatilization (if the water gets logged in the pit). e. the top soil, which contains the majority of nutrients and organic material. This can be prevented by maintaining a dense plant cover and with constructions such as terracing.

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