Abstract

• Organic fertilizers are carbon-based compounds that increase the productivity and the growth quality of plant, and soil fertility. In the present work, the organic fertilizers were prepared using bat guano , rice husk ash, groundnut leaves with three different weight ratios of 1:1:1 (OF-1), 1:2:1 (OF-2) and 1:3:2 (OF-3) by compost heap method. Some chemical properties of the prepared organic fertilizers and the contents of macronutrients and micronutrients were determined by both modern and conventional methods. Organic fertilizers contained high amount of nitrogen i.e., 1.87 % , 1.44 % and 1.22 % and high amount of carbon i.e., 15.45 %, 14.80 % and 14.38 % in OF-1, OF-2 and OF-3 respectively. Low C:N ratios were observed in these fertilizers. Higher amount of macro and micronutrients were found in OF-1 than the other two fertilizers. The prepared organic fertilizers can be used as a substitute to inorganic fertilizers for the crop cultivation.