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<br />'rho ;lirport \~eather station, operated by the [nvil"onment.;rl Data
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<br />Sel'vice, U.S. Department of COllunel'co, is. surrounded by a desert
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<br />e;wil'onffient ;lnd "as not representative of the irrigated area.
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<br />Thol.cforc a cOIn~llc~o h'caLhcr station h'as c~tablishcd ,...ithin the
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<br />irrigated area to be more reJlresentative of the irrigated environ-
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<br />ment .for scheduling Jll.lposes. The station was.installed and is sel"V-
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<br />iced by porsonnel of the in'igation scheduling program. Rent is
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<br />paid to a participam:' for' ~lSO of tho land and also to take dai ly
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<br />F01' tlic initial ye:lr of opora tions soil water holding capacities,
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<br />obtained in 1940 by the Soil Conservation Service, were used, This
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<br />soil characte;:istic is nc.::Jcd to determine what is required to
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<br />replace the root zone moisturo without excessivo leaching: Near
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<br />the end of the 1972 irrigation season soil moisture retention appa-
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<br />rat LIS I,as pUl'chased. to accurately detel'r.line soil water holding
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<br />cap:lcltios. (See photo on next page.) Throughout the nonirrigation
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<br />season representative soil :;amplcs \1ere collected and analyzed to
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<br />determine water-holding capacities al,d in SOlne casos electrical
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<br />conductivity (percent salt) :lnd pH.
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<br />Durin!: the 1972 and 1973 SClasons a CDC 3100 cor.<pl.lter at the Atomic
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<br />Energy Cor.unission Compound.:lt Grand Junction W<lS used, Each field
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<br />lias visited weekly by one'of the five field representatives to com-
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<br />pare the CO;Jj)ute::: printout \~i tl. the actl.l:ll field conditions. Cro?
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