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<br />I..
<br />'• CO-CPA-1 U. S. Dept, of Agriculture
<br />4/22 Soil Conservation Service
<br />(180-12-11)
<br />CCNSERVATIIN PUIN HAP AND
<br />SOIL AND CAPABILITY HAP LFl,END SHEET
<br />Different kinds of soil, range Bites, or woodland sites are separated on the
<br />map by solid back lines, 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 />19-Graypolnt graveily sandy loam, 0 to 7 percent
<br />slopes. 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 />formed in alluvium derived, principally from basalt. The
<br />average annual precipitation is about 7 inches, the aver-
<br />age annual air temperature Vs about 41 degrees F, and
<br />the frost•free season lasts about g5 days.
<br />Included in mapping are small areas of Derrick very
<br />cobbly sandy loam, Platoro 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 of more than
<br />60 inches, is sand or gravel.
<br />Permeability is moderate. Available 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 so(I is used for irrigated crops, irrigated pasture
<br />and hayland, and range. Crops are small grains, alfalfa,
<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, western wheatgrass, needleandthread, blue
<br />grams, wintertat, and lourwjng saltbush. If the range de-
<br />teriorates, the proportions of Indian ricegrass, need-
<br />leandthread, and western wheatgrass decrease and the
<br />amounts of blue grams, squirreltall, lhreeawn,
<br />snakeweed, and rabbitbrush increase. Undesirable
<br />weeds and annual plants invade and become abundant if
<br />the range condition becomes poorer.
<br />Seeding is generally not advisable because of low
<br />rainfall and low available water capacity. Deterred graz-
<br />ing, cross fencing, and stock water facilities help prevent
<br />range deterioration and 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 o1 livestock grazing. In irrigat-
<br />ed areas, crop residues from allaHa, barley, and oats
<br />may be used by pheasant, waterfowl, and geese.
<br />Generalized Descriptions
<br />(Detailed descriptions are available it
<br />your Soil Conservation Service office,)
<br />The greatest soil limitation for urban development is
<br />excessive seepage due to the graveily substratum.
<br />Caving of cutbanks is a hazard when excavating. Septic
<br />lank systems and sanitary landfills may contaminate
<br />ground water because of the permeability of the soil.
<br />Community sewage system should be provided it the
<br />population density Increases. The capability subclasses
<br />are IVs irrigated and Vlls nonirrigated.
<br />RANGE SITE: MOUNTAIN OUTWASH
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