Status of Diazotropic Bacteria and Electro-Chemical Properties of Soil in Different Districts of Eastern Uttar Pradesh, India

Asymbiotic and associative diazotropic bacteria such as Azotobacter and Azosprillum, respectively are widely distributed in different rhizospheric and nonrhizospheric soils and help in growth and development of plants. Sixty two soil samples were collected from different crop rotations namely Rice-Wheat, Vegetables, Agro forestry and Grassland from the districts Chandauli, Jaunpur,Ballia, Ghazipur, Sultanpur and Faizabad of eastern Uttar Pradesh in India for enumerating population of Azotobacter & Azospirillum and electro-chemical properties of soil. The result showed that per gram cfu of Azotobacter and Azospirillum in rice-wheat ranged from 10x 105 to 21 x 105 and 5.5 x 105 to 15 x 105, in vegetables 14.5 x 105 to 21 x 105 and 9 x 105 to 15 x 105, in agro-forestry 11x 105 to 20 x 105 and 6 x 105 to 14 x 105 and in grassland 8x 105 to 12 x 105 and 5 x 105 to 9 x 105, respectively. Soils had a neutral to sodic reaction (pH= 7.2-8.9), medium to high organic carbon (0.59-0.94%), low to medium phosphorus (5.34 -10.23 kg ha-1), medium to high potassium (129-379 kg ha-1) and medium available nitrogen (310-466 kg ha-1).