KUMAR, Dileep; SINGH, A. P.; MEENA, V. S. Improvement of Soil Fertility and Rice Productivity with Use of Coal Derived Humic Acid and Mineral Fertilization under Inceptisol of Varanasi, India. International Journal of Bio-resource and Stress Management, [S. l.], v. 8, n. Oct, 5, p. 692–697, 2017. Disponível em: https://ojs.pphouse.org/index.php/IJBSM/article/view/1176. Acesso em: 25 apr. 2024.