Bocar AHAMADOU; Qiaoyun HUANG; Lin YAPING; Javed IQBAL. Humic Substances as Indicator of Sustainable Crop Management Practices of Ultisols in Southern China. Research Highlights in Agricultural Sciences Vol. 6, [S. l.], p. 94–115, 2022. DOI: 10.9734/bpi/rhas/v6/8946F. Disponível em: https://stm.bookpi.org/RHAS-V6/article/view/8849. Acesso em: 13 jun. 2026.