Infiltration and runoff losses under fallowing and conservation agriculture practices on contrasting soils, Zimbabwe
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1 janvier 2012
- handle: 10670/1.78eyat
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G Nyamadzawo et al., « Infiltration and runoff losses under fallowing and conservation agriculture practices on contrasting soils, Zimbabwe », Water SA, ID : 10670/1.78eyat
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Fallowing and conservation agriculture are sustainable farming practices that can be used for soil and water conservation. The objectives of the study were to evaluate the effects of different conservation agriculture practices on rainfall infiltration and soil and water losses across 4 sites, using simulated rainfall. The study was carried out at Domboshawa and the Institute of Agricultural Engineering and Chikwaka smallholder farming areas, 4 sites with different soil types. Conservation agriculture practices evaluated were mulch reaping (MR) and clean reaping (CR) at Domboshawa with 5% clay and the Institute of Agricultural Engineering (IAE) with 50% clay. The study also evaluated runoff losses from fallow plots subjected to no tillage (NT) and conventional tillage (CT) at ICRAF Domboshawa site (20% clay) and fallows subjected to CT in Chikwaka smallholder farming areas (4% clay). Infiltration rates were greater under conservation agriculture practices (>35 mm-h-1) when compared to CT (