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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/9513

Title: Estimation of medium-term soil redistribution rates in Ibadan, Nigeria, by using the Cs technique
Authors: Jungea, Birte
Dercon, Gerd
Abaidoo, Robert C.
Chikoye, David
Stahr, Karl
Issue Date: Oct-2008
Publisher: Conference on International Research on Food Security, Natural Resource Management and Rural Development Estimation
Citation: Conference on International Research on Food Security, Natural Resource Management and Rural Development Estimation, 2008
Abstract: Soil erosion is a widespread and serious problem in Nigeria, West Africa. The 137Cs technique is an alternative to field plots for generating data on medium-term soil redistribution. It was tested in 2007 in Ibadan, Nigeria, which means the first time in the derived savanna. To analyse the vertical and spatial distribution of this nuclide in the soil, core samples were taken either randomly or along transects in an uncultivated and a cultivated site. The study showed an accumulation of 137Cs near the soil surface and a slow decrease with depth in the undisturbed site. The arable land was characterized by an almost uniform 137Cs distribution within the ploughed layer. The reference inventory of 137Cs determined on the uncultivated site was 569.3 ± 150.1 Bq m-2; the inventory of 137Cs on the field ranged from 96.9 to 1494.4 Bq m-2. Comparisons with the reference inventory showed smaller values for the upper slope and higher values for the lower slope of the cultivated site, which indicated soil redistribution. The conversion of the inventories into quantitative data of erosion and deposition by a proportion model revealed, for example, that about 148.5 t ha-1 yr-1 were eroded from the cropland in furrows leading downslope. The estimated results were comparable to erosion measurements made nearby. Hence, the 137Cs technique is useful as a method to generate data on soil redistribution and therefore a tool for improved natural resource management in Nigeria.
Description: An article published by Conference on International Research on Food Security, Natural Resource Management and Rural Development, October 7-9, 2008
URI: http://hdl.handle.net/123456789/9513
Appears in Collections:College of Science

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