Comparative study was performed to evaluate composting efficiency of three earthworm species viz.
Eisenia foetida, Eudrilus eugeniae and Perionyx excavatus. The results clearly elucidate that experiment (2) with Eisenia foetida gives over all best results followed by experiment (3), experiment (4) and experiment (1). The results show a high increase in nitrogen, potassium and high decrease in organic carbon, C/N and C/P ratios in experiments (2), (3) and (4). There was maximum (117.39%) increased found in nitrogen content of experiment (2), while minimum (9.13%) in experiment (1). The maximum (110%) increased found in potassium content of experiment (2) while minimum (51.61%) increase observed in experiment (1). [Nature and Science. 2010;8(1):33- 43]. (ISSN: 1545-0740).