Characterization of a Commercial Grade Humic Acid (HA) and Its Impact on Soil Properties and the Yield of Maize. International Journal of Life Science and Agriculture Research , [S. l.], v. 2, n. 8, p. 235–247, 2023. DOI: 10.55677/ijlsar/V02I08Y2023-06. Disponível em: http://ijlsar.org/index.php/ijlsar/article/view/98. Acesso em: 13 mar. 2025.