OM SINGH; P.C. GUPTA. Effect on seed vigour and soil moisture content of spring sunflower (Helianthus annuus) hybrid and yield influenced by sowing time and irrigation. Indian Journal of Agronomy, [S. l.], v. 47, n. 3, p. 47_3 , 2001. DOI: 10.59797/ija.v47i3.3184. Disponível em: https://pub.isa-india.in/index.php/ija/article/view/3184. Acesso em: 26 jun. 2026.