Utami, K., Muktamar, Z., Barchia, F., Gusmara, H., Sucahya, H. and Salim, H. (2025) “Distribution of humic substances and organic matter fraction: effects of long-term application of vermicompost”, International Journal of Agricultural Technology, 21(4), pp. 1617–1628. doi: 10.63369/ijat.2025.21.4.1617-1628.