S. K. YADAV, Y. SINGH, M. K. YADAV, S. BABU, and K. SINGH, “Effect of organic nitrogen sources on yield, nutrient uptake and soil health under rice (Oryza sativa) based cropping sequence”, Indian J Agri Sci, vol. 83, no. 2, Mar. 2013, doi: 10.56093/ijas.v83i2.27983.