Matheus, Rupa, Donatus Kantur, and Maria K Salli. 2023. “Utilization of Organic Soil Amendments and Phosphorus Fertilizer to Improve Chemical Properties of Degraded Dry Land Vertisol and Maize Yield”. Journal of Degraded and Mining Lands Management 10 (2). Malang, Indonesia:4297-4304. https://doi.org/10.15243/jdmlm.2023.102.4297.