Evaluation of Nitrogen, Phosphorous and Potassium of Some Crops Straw and Their Corresponding Vermicompost Using <i>Eisenia fetida</i> in Bedele District, Buno Bedele Zone, Oromia Regional State, South West Ethiopia

Vermicomposting is a Biotechniques and vermicompost are a good superlative for organic farming. The aim of present study was to evaluate supplement of nutrient from Pisum sativum, Guizotia abyssinica and Eragrostis tef through the process of vermicompost employing Eisenia fetida to treat soil acidity and maintain soil fertility and to enhance farmer&rsquo;s crop productivity. The prepared for laboratory analysis and vermicomposting at PH 7.0, temperature 23 oc and Moisture level of 80%. For vermicomposting three local bins were prepared, then each with 0.125 Kg of field pea residue, noug residue and teff hay with 300 fetida were added in bin one, two and three respectively. Among residues, pea residue took 122th days which was the highest of the day for the decomposition to be completed. The highest TN% was obtained in the treatment T2 (2.866%) followed by T1 (2.557%). The percentage of total Phosphorus content was highest in T3 (0.305%), which may be due mineralization of phosphorous. The highest percentage of total K content was highest in T1 (4.404%), which could be attributed by pisum sativum. The enhancement of nutrients in vermicompost was probably due to mineralization of the organic matter, action of microorganisms and earthworms. In order to maintain soil fertility and increase productivity vermicompost is recommended for farmers rather than commercial fertilizer