The use of some soil aggregate indices to assess potential soil loss in soils of south-eastern nigeria
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Department of Soil Science, University of Nigeria, Nsukka, Nigeria
Int. Agrophys. 1995, 9(2): 95-100
Six aggregate indices and some soil properties were evaluated to predict potential soil loss in soils of Southeastern Nigeria. Of the aggregate indices tested, dispersion ratio (DR), Wischmeier's erodibility index (K), clay dispersion index (CDI) and clay floccula-tion index (CFI) ranked higher than geometric mean diameter (GMD) and mean-weight diameter (MWD) in predicting potential soil loss. Some aggregate indices found to correlate well with soil loss are in order of decreasing predictability CFI>CDI>DR>GMDŁMWD while organic carbon, % clay content and Fe.O. are some soil characteristics that predict the potential of these soils to erode fairly accurately. Dispersion and flocculation are shown to be influenced by metal-organic complexes which often leads to increased potential soil loss.
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