NUON, D. Effects of leonardite and nutrient management on growth and yield of cowpea (Vigna unguiculata L. Walp.). Journal of Science and Agricultural Technology, [S. l.], v. 3, n. 1, p. 25–29, 2022. DOI: 10.14456/jsat.2022.5. Disponível em: https://ph02.tci-thaijo.org/index.php/JSAT/article/view/245816. Acesso em: 5 may. 2024.