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Fremont County Area, Colorado
<br />are the main irrigated crops. Corn for silage is a minor
<br />crop.
<br />The potential plant community is mainly blue grama,
<br />western wheatgrass, and sideoats grama. The average
<br />annual production of air-dry vegetation is about 800
<br />pounds per acre. If the condition of the range
<br />deteriorates, red threeawn, ring muhly, pricklypear, and
<br />broom snakeweed increase. Range seeding is suitable
<br />if the range is in poor condition.
<br />If this soil is used for irrigated crops, the main
<br />limitation is the hazard of erosion. The seedbed should
<br />be prepared on the contour or across the slope where
<br />practical. If furrow or corrugation irrigation systems are
<br />used, runs should be on the contour or across the
<br />slope. The water can be applied by furrow, corrugation,
<br />sprinklers, or flooding from contour ditches. It should be
<br />applied at a rate that ensures optimum production
<br />without increasing deep percolation, the runoff rate, or
<br />the hazard of erosion. Leveling helps to ensure the
<br />uniform application df water.
<br />Nonleguminous crops respond to applications of
<br />nitrogen and phosphorus, and leguminous crops
<br />respond to applications of phosphorus. Proper stocking
<br />rates, pasture rotation, and restricted grazing during wet
<br />periods help to keep the pasture in good condition and
<br />protect the soil from erosion. If properly managed, this
<br />soil can produce 3.5 tons of irrigated alfalfa hay per
<br />acre.
<br />This soil is well suited to homesite development.
<br />The capability classification is Ille, irrigated, and Vle,
<br />nonirrigated. The soil is in the Loamy Pfains #6 range
<br />site.
<br />150 Kim loam, cool, 3 to 8 percent slopes. This
<br />deep, well drained soil is on fans and fan terraces. It
<br />formed in alluvium and wind-deposited fine sands and
<br />silt. The native vegetation is mainly grasses. Elevation
<br />is 5,300 to 6,100 feet. The average annual precipitation
<br />is 13 to f 5 inches, the average annual air temperature
<br />is 48 to 51 degrees F, and the average frost-free period
<br />is 125 to 155 days.
<br />The soil is typically loam to a depth of 60 inches or
<br />more. It is moderately alkaline.
<br />Included with this soil in mapping are areas of
<br />Cascajo soils on short breaks. These soils have a
<br />surface layer of very gravelly sandy loam. They make
<br />up about 5 percent of the map unit.
<br />Permeability is moderate in the Kim soil. Available
<br />water capacity is high. Effective rooting depth is 60
<br />inches or more. Runoff is medium or rapid, and the
<br />hazard of water erosion is moderate to very high.
<br />Most areas of this soil are used as rangeland. A few
<br />areas are used for irrigated hay and pasture.
<br />The potential plant community is mainly blue grama,
<br />45
<br />western wheatgrass, and needleandthread. The
<br />average annual production of air-dry vegetation is about
<br />f , f 00 pounds per acre. If the condition of the range
<br />deteriorates, blue grama, red threeawn, broom
<br />snakeweed, and rabbitbrush increase. Range seeding is
<br />suitable if the range is in poor condition.
<br />The major management concerns in areas used for
<br />irrigated hay and pasture are the hazard of erosion and
<br />the application of irrigation water. The seedbed should
<br />be prepared on the contour or across the slope where
<br />practical. In sloping areas, leveling is needed for the
<br />efficient application and removal of irrigation water. The
<br />water should be applied at a rate that ensures optimum
<br />production without increasing deep percolation, the
<br />runoff rate, or the hazard of erosion. Fertilizer is needed
<br />to ensure the optimum growth of grasses and legumes.
<br />If properly managed, this soil can produce 3.5 tons of
<br />irrigated alfalfa hay per acre.
<br />This soil is well suited to homesite development.
<br />The capability classification is Ille, irrigated, and IVe,
<br />nonirrigated. The soil is in the Loamy Foothill #202
<br />range site.
<br />51-Kim loam, moderately wet, 0 to 3 percent
<br />slopes. This deep, moderately well drained and
<br />somewhat poorly drained soil is on stream and fan
<br />terraces. It formed in alluvium. Elevation is 5,200 to
<br />5,300 feet. The average annual precipitation is 12 or 13
<br />inches, the average annual air temperature is 52 or 53
<br />degrees F, and the average frost-free period is 160 to
<br />170 days.
<br />In Lincoln Park this soil is typically loam to a depth of
<br />60 inches or more. In the Fourmile area it consists of
<br />strata of loam, clay loam, and silty clay loam. It is
<br />moderately alkaline.
<br />Included with this soil in mapping are areas of the
<br />moderately wet Limon soils in areas along Fourmile
<br />Creek. These soils have a surface layer of silty clay
<br />loam. They make up about 5 percen! of the unit. They
<br />are slightly saline in some areas that are not irrigated.
<br />In these areas, the fluctuating water table deposits salts
<br />in the upper part of the soil.
<br />Permeability is moderate in the Kim soil. Available
<br />water capacity is high. Effective rooting depth is
<br />somewhat limited by a seasonal high water table at a
<br />depth of 2 to 6 feet during the irrigation season. During
<br />other times of the year, the water table is at a depth of
<br />3 to 8 feet and is below a depth of 5 feet in most areas.
<br />Runoff is slow, and the hazard of water erosion is
<br />slight.
<br />The areas of this soil on high terraces along Fourmile
<br />Creek and the Arkansas River have a water table at a
<br />depth of about 2 to 6 feet during the irrigation season. A
<br />seasonal high water table is at a depth of about 3.5 feet
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