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<br />-17- <br /> <br />-.-...--.-..... <br /> <br />---- - - - ------ <br />average unit prices for the period, was ~1;148,660,-or-about-~Z;700~000-lesB~-- <br /> <br />.., <br />1". <br /> <br />then in 1930, and about $2,400,000 less than in 1929, <br /> <br />Plate No. 2 shows the "measure of crop values" based on the mean acreage <br /> <br />of the principal crops for the period 1923 to 1936, inclusive, and the average <br /> <br />unit price of crops for that period, plotted against the November to October <br /> <br />diversions plus the November to October precipitation. In this graph there <br /> <br />is eliminated entirely the influence of variable acreage of the various crops. <br /> <br />The value used is an index of crop production per acre. <br /> <br />The close correlation between water supply and crop production may be <br />princiIlal crops <br />noted by this plate. If the acreage devoted to the six~was the average for <br /> <br />, <br /> <br />the Ileriod under consideration, it is estimated from this plate that the value <br /> <br />"0 <br /> <br />of additional water supply for the area is about $4.00 per acre-foot per year <br /> <br />in increased gross production of crops. <br /> <br />However, due to the character of the water supply, the acreage of high <br /> <br />priced row crops raised in the area is low. A comparison was made of the type <br /> <br />of crops raised in Bent and Prowers counties and the crops raised in Weld <br /> <br />county, The total water supply available for use in Weld county is not any <br /> <br />more per acre than it is in Bent and Prowers counties, but it is practically <br /> <br />ell controlled and subject to use when most needed. As a result, for the <br /> <br />period 1923 to 1936, inclusive, of the total acreage of principal crops in <br /> <br />Weld county, there was an average of about 28% in row crops; while for the <br /> <br />same period the average percentage of row crops in Bent oounty was about <br /> <br />6% and in Prowers. county about 7%. This is shown in the following table: <br />