Soil and Water Conservation in Semi-arid Areas
The problems of agriculture in the semi-arid regions; Assessing the possibilities for improving agriculture; Soil conservation; Water conservation; Water harvesting and use; Applications of water conservation.
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Africa agriculture allow amount annual rainfall application areas Australia bank basin beds built bunds capacity catchment channel clay collecting conservation construction contour countries crop cultivation deep described developed discussed diversion drains earth effect erosion example extension farmers farming Figure flood flow FREE furrows give grass grazing hand important improved increase India infiltration irrigation Kenya labour land lead less lines lower mean methods moisture natural particularly percent pipe planting Plate possible practice problems production rain rainfall range ratio reduce reported result ridges river run-off schemes season semi-arid semi-arid areas semi-arid regions shown shows similar simple slope soil soil conservation spillway spreading stone storage stored structures studies successful suitable supply surface tanks techniques terraces tillage trees usually wall weir Western wide yield និង