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International Journal of Soil Science
Year: 2011  |  Volume: 6  |  Issue: 3  |  Page No.: 150 - 163

Variation in Some Physical Properties of Soils Formed on a Hilly Terrain under Different Land use Types in Nigerian Savanna

W.B. Malgwi and S.T. Abu    

Abstract: Physical properties of soils formed on a hilly terrain were investigated in three identified landscape positions (upper, middle and lower positions) under two land use types (Fallowed and Cultivated land). Three soil profile pits were dug randomly in each landscape position, described and samples were taken from each horizon for laboratory analysis. SAS 8.2 and SPSS 16.0 were used to analize data. Mostely in detail showed significant differences in soil properties among the land use types, landscape positions (except in clay dispersion index) and pedons. Fallowed compared to continuously cultivated land got significantly higher values of silt and clay, organic carbon, aggregate stability indices, pore size classes and water retention capacities. Significantly (p<0.0001) higher sand fraction, macroaggregate stability, BD and lower water retention capacities were recorded at the upper landscape position compared to the other positions. The lower landscape position compared to the other positions got significantly (p<0.0001) higher silt and clay fractions, microaggregate stability indices, porosity, OC and water retention characteristics. The epipedons compared to the endopedons of the soils had significantly (p<0.0001) higher organic carbon, aggregate stability indices, pore size classe and moisture retention at various capacities. Of the three factors, the distribution of pore size classes (except macroporosity), BD and water retained at various capacities were to a greater extent influenced by changes in landscape positions whereas the distribution of OC and aggregate stability of the soils were more dependant on changes in land use.

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