By John K Syers, Frits W T Penning de Vries
This publication offers an up to date info on Vertisols study, and publications readers to big reference fabric. 4 keynote papers and 8 state papers and nationwide views at the administration of Vertisols in Malawi, South Africa, Sudan, Tanzania, Zambia, Zimbabwe, Ghana and Ethiopia are offered. overseas views at the administration of (Vertisols in India, Australia and Texas, united states) also are mentioned. on hand In Print
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4. Summary of the effect of different types of summer cover on annual runoff and soil movement during 1978–1984 for two Vertisols (a black earth at Greenmount and a grey clay at Greenwood) on Eastern Darling Downs, Australia. vp Wednesday, July 18, 2001 8:53:38 AM Color profile: Disabled Composite Default screen J. Hussein and M. Adey 32 impact. Zero tillage was the most effective in reducing soil erosion and bare fallow the least effective. Freebairn and Wockner (1986) concluded that soil movement could be reduced by 80–90% if a soil cover of 20–30% were maintained during the most erosive period (October–March).
Soils – Vegetation – Environment. Masson, Paris, 264 pp. Dudal, R. (1965) Dark clay soils of tropical and subtropical regions. FAO Agricultural Development Paper No. 83. FAO, Rome, Italy, 161 pp. Dudal, R. (1980) Soil-related constraints to agricultural development in the tropics. In: Soil-related Constraints to Food Production in the Tropics. IRRI and Cornell University, Los Banos, The Philippines, pp. 23–37. Dudal, R. (1989) Vertisols of subhumid and humid zones. Proceedings IBSRAM Inaugural Workshop, ICRISAT, India, pp.
Advances in Soil Science, Vol. 1. Springer-Verlag, New York, pp. 1–63. Enters, T. (2000) Methods for the Economic Assessment of the On- and Off-site Impacts of Soil Erosion, 2nd edn. Issues in Sustainable Land Management No. 2. IBSRAM, Bangkok, Thailand. FAO (1987) African Agriculture: the Next 25 Years. FAO, Rome. M. H. (1986) A study of soil erosion of the Eastern Darling Downs, Queensland. I Effects of surface conditions on soil movement within contour bay catchments. Australian Journal of Soil Research 24, 135–158.