SINGH, R.J. and AHLAWAT, I.P.S. (2011) “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, 81(7). Available at: https://epubs.icar.org.in/index.php/IJAgS/article/view/7376 (Accessed: 23 October 2025).