Ambrose James Torreon James Melbert Guisando Geric Francis Jongko Michelle Barbon Fernando Department of Mathematics, School of Science and Engineering, Ateneo de Manila University, Katipunan Avenue, Brgy Loyola Heights, Quezon City 1108, Philippines Department of Architecture, College of Humanities and Social Sciences, University of the Philippines Mindanao, UP Mindanao, Tugbok, Davao City, 8000 Davao del Sur, Philippines Department of Biology, College of Arts and Sciences, Xavier University - Ateneo de Cagayan, Corrales Avenue, Cagayan de Oro City 9000 Philippines DOST - Philippine Science High School - Caraga Region Campus, Brgy. Ampayon, Butuan City 8600, Philippines Proceedings of the International Academy of Ecology and Environmental Sciences ISSN 2220-8860 http://www.iaees.org/publications/journals/piaees/online-version.asp 2025 15 4 92 101 International Academy of Ecology and Environmental Sciences Hong Kong 11 April 2025 20 May 2025 1 December 2025 agricultural lands available phosphorus forest lands SOC soil quality. Soil is a natural resource that is essential for both the environment and agriculture, which promotes plant growth and makes up the bulk of the biosphere. Physical characteristics such as MC, BD, and Texture, and chemical characteristics such as SOC, TN, AP, pH, and EC affect the soil's ability to maintain ecosystem health. 31 soil samples (0-30 cm soil depth) were collected from three land use systems (LUSs) (forest, agricultural, and mining lands) across the Caraga Region in the Philippines. The parameters were measured using standard methods and procedures. The results of the study support a consensus that the physico-chemical properties of Mining Lands (MLs) are the poorest in quality, but are counterintuitive to another consensus that the physico-chemical properties of the soils of Forest Lands (FLs) are significantly higher than Agricultural Lands (ALs). This was based on the overall higher chemical quality of ALs than FLs and their contradictory results in terms of BD. Given these results, this research suggests the potential of incorporating soil quality testing as a complementary or alternative approach to GIS and remote sensing in identifying and proposing suitable land use strategies (LUSs). http://www.iaees.org/publications/journals/piaees/articles/2025-15(4)/physico-chemical-properties-of-soils.pdf