Science: v.1-v.219Moses King, 1959 |
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Стр. 1329
... irrigation , and yet has a sizable portion of the driest section of North America . The growth of irrigation farming in California there- fore provides us with an excellent exam- ple of pressure on arid lands in an area where living ...
... irrigation , and yet has a sizable portion of the driest section of North America . The growth of irrigation farming in California there- fore provides us with an excellent exam- ple of pressure on arid lands in an area where living ...
Стр. 1331
... Irrigation had already begun , too , at this early date in the southeastern desert region . But most of the irrigated crop- and of the region was concentrated in the relatively cool Owens Valley , in the extreme northern portion . The ...
... Irrigation had already begun , too , at this early date in the southeastern desert region . But most of the irrigated crop- and of the region was concentrated in the relatively cool Owens Valley , in the extreme northern portion . The ...
Стр. 1338
... irrigation appears to give promise of good results . The irrigated valley floor appears in the foreground , and ... irrigation must be continued almost throughout the year . This , in turn , requires a greatly enlarged cropping acreage ...
... irrigation appears to give promise of good results . The irrigated valley floor appears in the foreground , and ... irrigation must be continued almost throughout the year . This , in turn , requires a greatly enlarged cropping acreage ...
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