SINGH RJ, AHLAWAT IPS. Productivity, competition indices and soil fertility changes of Bt cotton (Gossypium hirsutum) – groundnut (Arachis hypogaea) (Gossypium hirsutum) – groundnut (Arachis hypogaea). Indian J Agri Sci. 2011;81(7). doi:10.56093/ijas.v81i7.7376