M. M. AGRAWAL; BHARAT SLNGH VERMA; CHUNCHUN KUMAR. Effect of phosphorus and sulphur on yield, N, P and S content and uptake by sunflower (Helianthus annuus). Indian Journal of Agronomy, [S. l.], v. 45, n. 1, p. 45_1 , 2001. DOI: 10.59797/ija.v45i1.3366. Disponível em: https://pub.isa-india.in/index.php/ija/article/view/3366. Acesso em: 25 jun. 2026.