Seminar, Volúmenes485-490R. Thapar, 2000 |
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Página 58
... groundwater irrigation has played a lead role in food security . Yields in areas irrigated by groundwater are often substantially higher than yields in areas irrigated from surface sources . In India , for example , research indi- cates ...
... groundwater irrigation has played a lead role in food security . Yields in areas irrigated by groundwater are often substantially higher than yields in areas irrigated from surface sources . In India , for example , research indi- cates ...
Página 59
... groundwater have typically been large farmers who produce surpluses for the market Small holders growing subsistence crops often depend on supplementary groundwater irrigation using a variety of man and animal - driven water lift- ing ...
... groundwater have typically been large farmers who produce surpluses for the market Small holders growing subsistence crops often depend on supplementary groundwater irrigation using a variety of man and animal - driven water lift- ing ...
Página 61
... groundwater aquifers are often impossible to remediate . Pollutants can become attached to the aquifer matrix ( the sand , soil and rocks ) and serve as a continuous source of contamination . Overdraft can lead to aquifer compaction ...
... groundwater aquifers are often impossible to remediate . Pollutants can become attached to the aquifer matrix ( the sand , soil and rocks ) and serve as a continuous source of contamination . Overdraft can lead to aquifer compaction ...
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