RATANAPROMMANEE, C.; CHINACHANTA, K.; CHAIWAN, F. Chemical characterization of leonardite and its potential use as a soil conditioner for plant growth enhancement. Asia-Pacific Journal of Science and Technology, [S. l.], v. 22, n. 4, p. APST–22, 2017. Disponível em: https://so01.tci-thaijo.org/index.php/APST/article/view/107637. Acesso em: 4 may. 2024.