R. KAUR, V. P. VERMA, Y. S. SHIVA, A. DASS, and S. SEPAT, “Nitrogen fertilizer management for enhancing productivity and nitrogen-use efficiency in Bt cotton”, Indian J Agri Sci, vol. 89, no. 12, pp. 2069–2073, Dec. 2019, doi: 10.56093/ijas.v89i12.96276.