PARTOYO, P.; NURSANTO, E.; ILCHAM, A.; SUPRIYANTA, B. Coal-Based Humic Acid Fertilizer Effects on Soil Properties and Mustard Growth. RSF Conference Series: Engineering and Technology, [S. l.], v. 4, n. 1, p. 135–143, 2025. DOI: 10.31098/cset.v4i1.1000. Disponível em: https://proceeding.researchsynergypress.com/index.php/cset/article/view/1000. Acesso em: 20 oct. 2025.