HAMZA, A. E.; EL-DAMARAWY, Y. A.; EL-ASHRY, S. M. Effect of potassium fulvate and organic nitrogen rates on growth, yield and nutritional status of onion plants grown in sandy soil. International journal of health sciences, [S. l.], v. 6, n. S3, p. 4247–4256, 2021. DOI: 10.53730/ijhs.v6nS3.6789. Disponível em: https://sciencescholar.us/journal/index.php/ijhs/article/view/6789. Acesso em: 9 may. 2026.