Land-Use Types Influence On Some Physical And Chemical Properties Of An Alfisol

ABSTRACT This study evaluated the influence of four land-use types: Continuous Cropped Land (CCL), Gmelina arborea plantation (GL), Tectona grandis plantation (TL), and African Star Apple plantation (ASAL) on selected physical and chemical properties of an Alfisol at the Federal College of Forestry, Ibadan, Nigeria. Soil samples were collected at 0–15 cm depth and analyzed for particle size distribution, bulk density, hydraulic conductivity, aggregate stability, available water content, porosity, pH, organic carbon, total nitrogen, available phosphorus, and exchangeable bases. Data were subjected to analysis of variance and means separated using Duncan’s Multiple Range Test at p ≤ 0.05. Results showed that continuous cropping significantly increased bulk density and reduced organic carbon, total nitrogen, and nutrient status compared to tree-based systems. Teak and Gmelina land uses exhibited improved soil structure, higher organic carbon (up to 39.10 g/kg), and better nutrient status. The findings indicate that continuous cultivation degrades soil quality, whereas tree-based systems enhance soil fertility and structural stability. Adoption of agroforestry and conservation practices is therefore recommended for sustainable soil management.   Keywords: Soil properties, Tree plantation, Land-use, land degradation