KUMAWAT, NARENDRA, et al. “Effect of Integrated Nutrient Management on Productivity, Nutrient Uptake and Economics of Rainfed Pigeonpea (Cajanus Cajan) and Blackgram (Vigna Mungo) Intercropping System”. The Indian Journal of Agricultural Sciences, vol. 85, no. 2, Feb. 2015, pp. 171-6, https://doi.org/10.56093/ijas.v85i2.46474.