Soil enzyme activities, microbial diversity and available nutrients status of an alfisol under long term fertilization

The changes in enzyme activities, microbial diversity and nutrients availability in soil under long term fertilization (30 years) with inorganic fertilizers alone or in combination with organics/amendments were investigated in the present study. The experiment consisted of eleven treatments with four replications with the finger millet-maize cropping sequence. Significantly higher biomass C (276.53µg/g) and biomass N (27.20 µg/g) contents were recorded with 100 % NPK+FYM+lime and 100 % NPK+FYM application respectively.