Simple stone lines are used for example in some West African countries notably Burkina Faso and earth bunding systems are found in Eastern Sudan and the Central Rangelands of Somalia A growing awareness of the potential of water harvesting for improved crop production arose in the 1970s and 1980s with the widespread droughts in Africa leaving a trail of crop failures
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Get PriceThe water absorption value for aggregates describes the percentage increase in weight between the dry aggregate and the saturated aggregate Therefore the absorption value is the amount of water which the aggregates are able to hold The absorption value can be ascertained using the water absorption test described in BS EN 1097 6 and should
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