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<br />illustrative. The total figures for primary and ancillary USes by
<br />function are:
<br />
<br />Resource
<br />Function
<br />
<br />Cropland
<br />Forest & Woodland
<br />P,'sture & Range Land
<br />Other Agricultural
<br />Recreation
<br />Fish & Wildlife
<br />Transportation, Urban
<br />&: Built-up
<br />Water
<br />Mineral Industry.
<br />Mili tary
<br />Total
<br />
<br />Total Acres
<br />in Millions
<br />
<br />103.8
<br />35.1
<br />186.3
<br />3,8
<br />68.6
<br />315.5
<br />7.8
<br />4.2
<br />0.3
<br />1.0
<br />r~b.4
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<br />Irrigation - Of particular significance in a water and related
<br />study is the amount of irrigation vhich 1s being accomplished. There
<br />are in the Missouri Basin over 8 million acres of land being irrigated.
<br />This has raised a problem which has not been fully resolved, primarily
<br />in the matter of definition of what irrigated land is. We have a sub-
<br />stantial area under vhat might be termed "Project Type" irrigation ..mere
<br />common supply works provide vater during the irrigation season for the
<br />lands and when water is available the lands are supplied all they can use.
<br />There are many privately-irrigated lands which have very comparable systems
<br />in that water is available to service the crops which are being raised on
<br />the land during the entire growth period. However, there is also much land
<br />in the Missouri Basin that receives vater to assist the graving of crops
<br />when and if water is available. Much of this is on the range and pasture
<br />land where we have water spreading devices which provide some supplemental
<br />water above that received by rainfall to the raising of additional grass.
<br />There is also Bome irrigation where the priority for right to use the water
<br />is low enough that only during the higher runoff seasons can water be ap-
<br />plied to assist the crop growth. In the Missouri Basin most of the States
<br />do have systems of appropriation of vater by vater rights. Most of the
<br />States also have a registration or a water right permit for use of ground-
<br />water. Thus, all but one of the States do have an official record of the
<br />amount of land and 'JB.ter for which they bave granted the right to use to
<br />their Citizens; howeverJ not all of the water rights are used every year
<br />for the acreage for which the permit 1s issued. Our problems in this field
<br />
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