SINGH, RAMAN JEET, and I P S AHLAWAT. “Productivity, Competition Indices and Soil Fertility Changes of Bt Cotton (Gossypium Hirsutum) – Groundnut (Arachis Hypogaea) (Gossypium Hirsutum) – Groundnut (Arachis Hypogaea)”. The Indian Journal of Agricultural Sciences, vol. 81, no. 7, June 2011, https://doi.org/10.56093/ijas.v81i7.7376.