Effect of surface treatments on soil crusting and infiltration |
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| Affiliation: | 1. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, 712100, China;2. College of Resources and Environment, Northwest A&F University, Yangling, 712100, China;1. Norwegian Institute of Bioeconomy Research, Fredrik A. Dahls vei 20, N-1432 Ås, Norway;2. Wageningen Environmental Research (Alterra), P.O. Box 47, 6700 AA Wageningen, Netherlands;3. University of Twente, Faculty of Geo-Information Science and Earth Observation, ITC 5-009, P.O. Box 217, 7500 AE Enschede, Netherlands |
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| Abstract: | The effects of phosphogypsum and plant residue mulches on soil crusting and infiltration were studied on a Rhodic Paleustalf in Northern Natal, South Africa. Under field conditions infiltration rates were considerably higher than those obtained with a laboratory type rainfall simulator. Both ameliorants were effective in countering crust formation. Their effect continued over a growing season (4–5 months). Scanning electronmicrographs showed that under moist conditions microbial hyphae and residues were prominent in the surface crust. Extractable soil P built up to high levels in the phosphogypsum treated plots. |
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