P. SHALLNL PILLAI; GEETHAKUMARI; V. L.; SHEEBA REBECCA ISSAC. Balance-sheet of soil nitrogen in rice (Oryza sativa) based cropping systems under integrated nutrient management. Indian Journal of Agronomy, [S. l.], v. 52, n. 1, p. 16–20, 2001. DOI: 10.59797/ija.v52i1.4881. Disponível em: https://pub.isa-india.in/index.php/ija/article/view/4881. Acesso em: 25 jun. 2026.