Kumar, A. , Singh, H. and Nigam, R. (2023) “Effect of organic nutrition on growth, yield and economics of knol-khol (Brassica oleracea L. var. gongylodes) cv. Pusa Virat ”, Journal of Eco-friendly Agriculture, 18(2), pp. 263–265. doi:10.48165/jefa.2023.18.02.7.