Nassr ع. م.; Assakkaf ع. ع. The effect of nitrogen and phosphorus fertilization on some vegetative growth of three sunflower (Heliathus annus L.) cultivars. University of Aden Journal of Natural and Applied Sciences, [S. l.], v. 19, n. 1, p. 13–23, 2015. DOI: 10.47372/uajnas.2015.n1.a02. Disponível em: https://uajnas.adenuniv.com/index.php/uajnas/article/view/269. Acesso em: 22 apr. 2024.