JATAV, SURENDRA SINGH, et al. “Effect of Direct and Residual Sewage-Sludge Application on Physiological Attributes of Rice-Wheat Cropping System”. The Indian Journal of Agricultural Sciences, vol. 92, no. 6, Jan. 2022, pp. 675-9, https://doi.org/10.56093/ijas.v92i6.98709.