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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 />W~PhO~ost below the 1300 micromhos/cm critical level which if <br />exceeded may cause reduced yield. Mancos River water is the only <br />irrigation water source with salinity (2278 micromhos/cmJ above the <br /> <br /> <br />1300 micromhos/cm critical level. This average salt content is <br /> <br /> <br />sufficient to reduce alfalfa yields by approximately 13 percent. <br /> <br />Crop cultural practices for irrigated and dry land alfalfa are <br />summarized in Tables 6.5, 6.6, and 6.7. These tables reflect the <br />different cultural practices/time requirements based on climatic <br />zone characteristics. The tables summarize the cultural practices <br />for alfalfa stand establishment and managing the established stand. <br />Fertility recommendations for irrigated and dry land alfalfa are <br />summarized in Tables 6.8 and 6.9. <br /> <br />6.2.2 Grass Hay and Pasture <br /> <br />Grass hay and pasture crops are important agricultural commodities <br /> <br />in Colorado. <br /> <br />According <br /> <br />to Colorado <br /> <br />Agricultural <br /> <br />Statistics <br /> <br />published by the Colorado Department of Agriculture, Colorado ranked <br />eleventh in the United States in total cattle production in 1984 with <br />about 3 million head of cattle and calves. This significant <br />livestock production level dictates the importance of readily <br />available quality grass hay and pasture throughout the state. <br /> <br />Currently, Colorado is producing about 924,000 tons of miscellaneous <br /> <br /> <br />hay types including wild millet and grain hays on about 660,000 acres <br /> <br /> <br />with an average yield of about 1.4 tons/acre. Approximately 65 <br /> <br />percent of these harvested acres are irrigated. <br /> <br />Montezuma and La <br /> <br />6- 11 <br />