V. SUMATHI; D. S. KOTESWARA RAO. Effect of organic and inorganic sources of nitrogen with different irrigation schedules on growth and yield of sunflower (Helianthus annuus). Indian Journal of Agronomy, [S. l.], v. 52, n. 1, p. 77–79, 2001. DOI: 10.59797/ija.v52i1.4896. Disponível em: https://pub.isa-india.in/index.php/ija/article/view/4896. Acesso em: 25 jun. 2026.