Prediction of soil loss and crop yields with different management scenarios in barrier system using the SCUAF model in semi-arid Burkina Faso
2006
Lojka, B. | Spaan, W. | Hoogmoed, W. | Posthumus, H.
The influence of different barriers on soil conservation and thus on sustainable crop yields in semi-arid zone of Burkina Faso was evaluated. A predictive computer model SCUAF was used to simulate four scenarios of different farming management to predict soil loss and crop yields over a period of 28 years. The simulation was based on the results of a field experiment assessing the effect of vegetation barriers Andropogon gayanus (perennial grass), Ziziphus mauritiana (shrub) and stone rows. The model predicted that vegetation and stone barriers significantly reduced soil losses and that higher soil losses occured in years with high rainfalls. When fertilizers were not applied, sorghum yields decreased in all four treatments due to a decreasing amount of available nutrients in the soil combined with soil organic matter losses. Application of organic manure has a larger positive effect on the yields than the use of inorganic fertilizers.
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