[5-1015-D] Other Categories (2)

[5-1015-D-05] ASSESSING LAND USE TYPES IMPACT ON SOIL ORGANIC CARBON IN SOUTH WEST, NIGERIA

*OLORUNWA ERIC OMOFUNMI¹, ADESOJI MATTHEW OLANIYAN¹ (1. FEDERAL UNIVERSITY OYE-EKITI(Nigeria))

Keywords:Federal University Oye Ekiti (Ikole campus), land use type, Soil organic carbon, Soil properties

The amount of soil organic carbon (SOC) stored in a particular soil is influenced by several factors including climate, vegetation type, land management, soil properties and current and last land use. The impacts of land use types on soil organic carbon were assessed. Four land use types were used in the study. Sampled soils were tahen at depth of 0 - 45 cm and at intervals of 15 cm. The soil samples were examined in accordance with the standard methods described by the American Public Health Association (APHA). The data were analyzed using descriptive statistics. The results showed the mean soil organic carbon content was higher under oil palm plantation land [D] compared with ther land use types at 0 - 15 cm soil depth (22.87g/kg) which was 1.5, 2.6 and 53.3 % more than in the Faculty of Agriculture Teaching and Research farm land [A], the cashew plantation land [B] and the Agricultural and Bioresources experimental farm land [C] respectively. This could be attributed to the greater inputs of vegetation (litter fall) and reduced decomposition of organic matter. Similarly, the lowest soil organic carboncontent under land use type C could be due to reduced inputs of organic matter and frequent tillage which encouraged oxidation oforganic matter. The finding indicated that the means of SOC in land use types were no significantly different (p = 0.05) except in the land use type C. It is concluded that land use types have influenced on soil organic carbon