top of page

Assessing the Effects of Land Use on Soil Physical and Chemical Properties in a Tropical Forest Ecosystem

Olayiwola, V. A, Olayiwola, Y. B, Pelemo, O. J, Olomola, D. B and Oyedeji, O. F.

Assessing the Effects of Land Use on Soil Physical and Chemical Properties in a Tropical Forest Ecosystem

This study investigated the effects of land use types on soil physicochemical properties in a tropical agroecosystem of southwest Nigeria. Soil samples were collected at two depth intervals (0–15 cm and 15–30 cm) from four land use types, namely Terminalia plantation (TP), Gmelina plantation (GP) fallowed land (FL), arable cropland (AC) and Nauclea plantation (NP). The particle size analysis showed higher sand content in Terminalia plantation (TP) 86.50% while clay was more prevalent in Gmelina plantation (GP) and fallowed land (FL) at the surface, and in arable cropland (AC) and Nauclea plantation (NP) at depth 0 – 15 cm. Silt content was highest in FL across both depths. Despite these differences, soil texture varied only slightly among land uses, ranging from sandy loam to sandy clay loam, suggesting minimal short-term impact of land use on inherent soil texture. Soil pH varied significantly, with the highest value in GP (5.76) at 15–30 cm and the least in NP (4.95) at 0–15 cm, corresponding with exchangeable base levels. Organic carbon declined with depth in most sites but remained high in AC (16.40%) and FL (16.74%) due to organic inputs. Total nitrogen followed a similar trend, peaking in FL (1.44%) at the surface and in AC (1.41%) at depth 0 – 15 cm. Available phosphorus was generally higher at the surface, except in TP (1.33%) soils. Micronutrients (Fe, Mn, Zn) were more concentrated in surface soils, likely due to organic matter decomposition and soil acidity. Bulk density increased and porosity decreased with depth, though exceptions occurred in TP, AC, and FL. Fallowed land consistently showed the lowest bulk density and highest porosity, reflecting enhanced organic matter and improved soil structure. Overall, land use significantly influenced soil physical and chemical properties, particularly in the topsoil layer

Nigerian Journal of

Forestry

© 2025 by Forestry Association of Nigeria.

bottom of page