Assessment of Land Degradation in Elsilate Scheme Using Some Biophysical Indicators, Sharge Elneel, Khartoum State, Sudan

Afaf Ibrahim Mohammed Elkhalifa, Eltegani Mohamed Salih, Alwahab Hassan Abd Alla

Abstract


Land degradation in Elsilate Scheme was assessed using some biophysical indicators in order to update the previously obtained information obtained by Soil Survey Administration, 1975 with regard to agricultural practices in the scheme. Soil Samples were collected by augur from five sites: forest land, bare land, range land, fodder land and vegetable land. Also, water samples were taken from the main canal, constructed from the Blue Nile. All Samples of soil and water were subjected to laboratory analysis. The analysis of physical and chemical properties of the samples and field observations indicated presence of land degradation, as reflected by the increase of the ESP in bare land and decrease of SAR in irrigated land due to leashing of salts. The results showed that the soil in study sites were not saline in the upper layer (0-30.30-60cm), but the lower layer (60-90cm) was slightly saline (2-4Ece). Statistical analysis indicated that there were significant differences (P≤0.0S) in some of the soil properties. The analysis showed high suitability of the canal water for irrigation (Ece =0.157ds/m), pH=8.03) alkaline. The characteristic of the drinking water in the study area fell in the recommended level of WHO (RSC=1.20). Appropriate land management systems like proper rotation, diversification of crops, methods of modern irrigation techniques as sprinkling or central pivot are suggested in order to control this level of deterioration. Also, it was recommended that a periodical assessment of land degradation in the scheme and private farms using biophysical indicators will help the decision makers in the State Ministry of Agriculture to evaluate the performance of private schemes and farms in the state.


Keywords


Land degradation; biophysical indicators; assessment;land management

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References


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