Organic manure is a one of the most important inputs for increasing the productivity of crop (Anon, 1997). In order to obtain good yield, modern varieties of different crops require relatively high quality of fertilizer compared to the traditional varieties. Organic manures are natural products used by farmers to provide nutrients for the crop plants. Organic matter in turn releases the plant nutrients in available from for the use of crops. They provide organic acids that help to dissolve soil nutrients and make them available for the plants. The compost prepared by using earthworms is called vermicompost. It is now-a-days regarded as a very important component of the organic farming package. It is easy to prepare, has excellent properties and is absolutely harmless to plants. The vermicompost contains 1.0-1.5 per cent of Nitrogen, 1.8-2.2 per cent of phosphorus and 1.0-1.5 per cent of potassium. Poplar commonly known for its fast-growing is deciduous tall tree with a fairly straight and slim trunk, rather open crown composed of a few large branches and attaining a height of 15 m. The branches are more or less angled or almost winged. Most of the poplar wood is used in the match box and plywood industry (Chaturvedi et. al., 1993). The species is suitable for making general purpose plywood, marine plywood, and concrete shuttering plywood. It is also considered suitable for the manufacture of artificial limbs, sports goods, and for structural false ceiling, and partition etc. It has also been found suitable as line supports for overhead electric pole and telecommunication lines. The white furniture made out of poplar wood is becoming popular in country (Tandon, 1991).

Sweet Potato is a wonderful gift of nature. The sweet potato is a dicotyledonous plant that belongs to the family Convolvulaceae. Its large, starchy, sweet-tasting, tuberous roots is an important tuber crops. The young leaves and shoots are sometimes eaten as greens.(Abidin, 2004). A part of the tuber harvest is used in India as cattle fodder. Sweet potato based soup are popular in China during winter. In Japan it is used as sweet potato couch spirit. Pusa red is popular variety used for eaten after simply boiling in pressure cooking (Zhang et. al., 1998). Although Pusa Red Varity of sweet potato is one of the important tuber crops in India, the actually yield of this crops is lower