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Widtsoe, John Andreas, 1872-1952

"Dry-Farming : a System of Agriculture for Countries under a Low Rainfall"

It may be remarked in this connection that
even where the distance to the water is small, the piped well has
been found to be superior to the dug well. Usually, water is
obtained in the dry-farm territory by driving pipes to comparatively
great depths, ranging from one hundred feet to over one thousand
feet. At such depths water is nearly always found. Often the
geological conditions are such as to force the water up above the
surface as artesian wells, though more often the pressure is simply
sufficient to bring the water within easy pumping distance of the
surface. In connection with this subject it must be said that many
of the subterranean waters of the dry-farm territory are of a saline
character. The amount of substances held in solution varies largely,
but frequently is far above the limits of safety for the use of man
or beast or plants. The dry-farmer who secures a well of this type
should, therefore, be careful to have a proper examination made of
the constituents of the water before ordinary use is made of it.
Now, as has been said, the utilization of the subterranean waters of
the land is one of the living problems of dry-farming.


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