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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />activity. During the period of April through August, the precipitotion is relatively high. <br />During June through August, temperatures normolly reach 900 Fond temperatures higher <br />than 1000 F are not uncommon. <br /> <br />The onnual precipitation in the project area averages 12 to 14 inches per year. At <br />Las Animas, for example, the precipitation averages about 12.9 inches per year, of which <br />about 70 percent occurs during the months of April through August. <br /> <br />The average monthly temperatures and precipitation at Las Animas are given in the <br />following table (period of record 1941-1970): <br /> <br /> Avg. Temp. Avg. Precip. <br /> Month (0 F) (in.) <br /> Jon 30.0 0.44 <br /> Feb 35.2 0.29 <br /> Mar 41.2 0.64 <br /> Apr 53.9 1.08 <br /> May 63.4 2.04 <br /> June 72.9 1.66 <br /> July 78.1 2.25 <br /> Aug 76.1 1.89 <br /> Sept 67.6 0.94 <br /> Oct 55.5 0.86 <br /> Nov 40.7 0.47 <br /> Dec 32.4 0.31 <br />1.3 Land Resources <br /> <br />The predominant soil ossociation for the land irrigated through the Fort Lyon Canal <br />is the Rocky Ford-Numa Association. Its characteristics include being deep, well <br />drained, and nearly level to gently sloping. It is located just north of the flood plain <br />along the Arkansas River on the terraces and lower lying parts of the uplands. It is fairly <br />uniform in topogrophy, soil types, and land uses. The Rocky Ford soils are deep clay <br />looms and have a loam subsoil. The Numa soils are similar to the Rocky Ford soils but <br />have clay subsoil. Nearly all the acreage is irrigated. <br /> <br />The other major soil association in the project area is the Manvel-Minnequa- <br />Penrose Association. This association is found at intermediate elevations between the <br />flood plain and the uplands. It is characterized of slopes of less than 10 percent with <br />some outcrops of limestone and limey shale. Nearly all the acreage is native grass and <br />used for pasture. <br /> <br />Of the 300,000 acres within the project area, about 93,000 acres are presently <br />irrigoted with water from the Fort Lyon Canal. This acreage is shown on Figure 3, with <br />the principal crops being wheat, corn, grain sorghum, and alfalfa. <br /> <br />2 <br />