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<br />"~ <br />',," <br />",? be made between "before" and "after" habitat quantities to determine the <br />"-~ <br /> <br />(::..~ <br /> <br />amount of change. "After" conditions would include samplIng immediately <br /> <br />following installation of measures and approximately 10 years later. <br /> <br />Habitat types will initially be mapped on orthophotos with a scale of <br /> <br />1 inch = 200 feet or on 8-inch to the mile photos. Subsequent mapping wil be <br /> <br />done on acetate overlays of the sample sites. <br /> <br />The following habitat types or conditions will be mapped and quantities <br /> <br />measured: agricultural crops (by kind), saltbrush, sagebrush, greasewood, <br /> <br />tamarak, cottonwood, willow, marsh (by type), edge (boundaries, field <br /> <br />borders, etc.). <br /> <br />There are three distinct agricultural areas in the Grand Valley: (1) <br /> <br />downstream from Grand Junction lying primarily north of the Colorado River; <br /> <br />(2) Palisade vicinity; and (3) Orchard Mesa. Sampling intensity wIll be <br /> <br />applied as follows: 75 percent of sample on agricultural units in the area <br /> <br />downstream from Grand Junction, with 25 percent divided between the other <br /> <br />two areas. <br /> <br />Total habitat changes due to the onfarm salinity control program will be <br /> <br />determined. This will be done by extrapolation using a ratio of habitat <br /> <br />change to acres treated for salinity control on the sample agricultural units <br /> <br />times the total acreage of agricultural units treated. <br /> <br />Data analysis will be the responsibility of the State and Area SCS <br /> <br />biologists. Data will be analyzed following completion of each sampling <br /> <br />cycle !:nd upon completion of planned salinity control actidties on the <br /> <br />sample sites. <br /> <br />38 <br />