| http://www.w3.org/ns/prov#value | - The question arises as to what proportion of any major expansion of irrigated agriculture might be based on ground-water use (based mainly on low-cost motorised water wells rather manual pumping techniques, such as hand and treadle pumps) - although it should also be recognised that various factors (such as a general lack of community tradition, the high capital-cost of water-well drilling, low le
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