Nandhini, D. U. ., M. . Thiyagarajan, and E. . Somasundaram. “Soil Fertility of Rice- Blackgram Cropping Sequence As Influenced by Different Organic Sources of Nutrients”. Bangladesh Journal of Botany, vol. 51, no. 2, June 2022, pp. 289-96, doi:10.3329/bjb.v51i2.60426.