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<br />~• CO-CPA-1
<br />4/92
<br />(160-12-11)
<br />
<br />U. S. Dept. of Agriculture
<br />So11 Conservation Service
<br />CQ7SERVATII2! PLAN MAP AND
<br />SOIL AND CAPABILITY HAP LEL"END SHEET
<br />Different kinds of soil, range sites, or woodland sites are separated on the
<br />map by solid black linen, Within each area is ar. identifying sym~ol or ~'
<br />name. The following symbols are shown on your map:
<br />Symbol or Site Name
<br />Generalized Descriptions ~
<br />19-Graypolnt gravelly sandy loam, 0 to 1 percent
<br />elopes. This is a deep, well drained soil on broad alluvial
<br />fans and terraces at elevations of 7,600 to 7,800 feet. It
<br />loaned in alluvium derived principally from basalt. The
<br />average annual precipitation is about 7 inches, the aver-
<br />age annual air temperature is about 41 degrees F, and
<br />the frost-tree soason lasts about 95 days.
<br />Included in mapping are small areas of Derrick very
<br />cobbty sandy loam, Plaloro loam, and San Arcacio sandy
<br />loam.
<br />Typically, the surface layer Is brown gravelly sandy
<br />loam about 5 inches thick. The subsoil is yellowish
<br />brown and pale brown, gravelly sandy clay loam about
<br />13 inches thick. The substratum, to a depth o1 more than
<br />60 inches, is sand or gravel.
<br />Permeability is moderate. Availablo water capacity is
<br />low. Runoff is slow, and the erosion hazard is slight.
<br />Effective rooting depth is 60 inches or more.
<br />This soil is used for irrigated crops, irrigated pasture
<br />and hayland, and range, Crops are small grains, allatla,
<br />potatoes, and other vegetables. Commercial fertilizer and
<br />manure need to be applied and plant residues returned
<br />to the soil. Irrigation methods suitable for this soil are
<br />border, furrow, and sprinkler. Sprinkler irrigation is well
<br />suited to most crops. The furrow method Is suited to row
<br />crops. Border irrigation is suited to alfalfa, small grains,
<br />and pasture if runs are relatively short. Land Leveling
<br />may expose gravel In the more shallow areas.
<br />The potential native vegetation is dominated by Indian
<br />ricegrass, wostorn wheatgrass, needleandthread, blue
<br />grams, winterfat, end lounving saltbush. If the range de-
<br />teriorates, the proportions -ol Indian ricegrass, need-
<br />leandthread, and western wheatgrass decrease and the
<br />amounts of blue grams, squirreltail, threeawn,
<br />snekeweed, and rabbitbrush increase. Undesirable
<br />weeds and annual plants invade and become abundant it
<br />the range condition becomes poorer.
<br />Seeding Is generally not advisable because of low
<br />rainfal{ and low available water capacity. Deterred graz-
<br />ing, cross fencing, end stock water facilities help prevent
<br />range deterioration end promote the growth of desirable
<br />plant species.
<br />Wildlife on this soil includes openland and rangeland
<br />species, such as jackrabbit, cottontail, coyote, and var-
<br />ious rodents. Production of vegetation suitable for wildlife
<br />habitat is limited when this soil is used as range and is
<br />not irrigated. Creating wildlife habitats on this soil re-
<br />quires proper management of livestock grazing. In irrigat-
<br />ed areas, crop residues from alfalfa, barley, and oats
<br />may be used by pheasant, waterfowl, and geese.
<br />(Detailed descriptions are available it
<br />your Soil Ca~servetion Service office,)
<br />The greatest soil limitation for urban development is
<br />excessive seepage due to the gravelly substratum.
<br />Caving of cutbanks is a hazard when excavating. Septic
<br />tank systoms and sanitary landfills may contaminate
<br />ground water bocauso of the pormoability of the soil.
<br />Community sewage system should be provided it the
<br />population density Increases. The capability subclassss
<br />are IVs irrigated and Vlls nonirrigaled.
<br />FANGE SITE: MOUNTAIN OUTWASH
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