DITTHAKIT, P.; SINGKHAM, J. The Use of Modified Leonardite for Water Convolvulus Growing in Clay Soil. STOU Journal of Agriculture (Online), Nonthaburi, Thailand, v. 1, n. 1, p. 47–56, 2019. Disponível em: https://so01.tci-thaijo.org/index.php/stouagjournal/article/view/246567. Acesso em: 17 may. 2024.