SHILPA, et al. “ Effect of Blackgram Genotypes and Nitrogen on Productivity, Profitability and Resource-Use Efficiency in Maize (Zea Mays) + Blackgram (Vigna Mungo) Intercropping System”. Indian Journal of Agronomy, vol. 64, no. 4, Oct. 2001, pp. 524-7, https://doi.org/10.59797/ija.v64i4.5304.