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<br />I.ARIMF.R COUNTY AREA, COLORADO
<br />dryiand management it is suited to pasture and native
<br />grasses. Capability units IIIe-2, irrigated, and IVe-3,
<br />di•yland; Loamy Plains. range site; windbreak suit-
<br />ability group 1.
<br />55-Kim foam, S to !9 percent elopes. This strongly
<br />sloping soil is on uplands and fans. This soil has the
<br />profile described as representative of the series.
<br />Included with this soil! in mapping are small areas of
<br />soils that have a surface: layer and subsoil of clay loam
<br />or silt loam and a few small areas of soils that have
<br />gravel on the surface. Also included are minor areas of
<br />Stoneham and Thedalutd soils.
<br />Runoff is rapid, and t:he hazard of erosion is severe.
<br />If irrigated, this soil is well suited to pasture and, to
<br />a Lesser extent, barley, ;alfalfa, and wheat. Under dry-
<br />iand management it is suited to pasture and native
<br />grasses. Capability units IVe-1, irrigated, and VIe--1,
<br />dryiand; Loamy Ylain;> range site; windbreak suit-
<br />ability group 1.
<br />56-kim-Thedalund loame, 3 to ~.S percent elopes.
<br />This complex consists of gently sloping to moderately
<br />steep soils on uplands, fans, and valleysides. It is about
<br />95 percent Kim Loam and about 35 percent Thedalund
<br />loam. Kim loam is smoother and less sloping, and
<br />Thedalund loam is steeper. These soils have profiles
<br />similar to the ones described as representative of their
<br />respective series, but tl,e surface layer is about 4 or 5
<br />inches thick.
<br />Included with these soils in mapping are a few small
<br />areas of Renohill and iYiidway soils, a few small out-
<br />crops and gravel knobs, and some small seep spots.
<br />Runoff is rapid, and the hazard of erosion rs severe.
<br />These soils are mainly used for pasture and native
<br />grasses. Capability unit. VIe-1, dryiand; Loamy Plains
<br />,•ange site ; windbreak suitability group 1.
<br />Kirtley Series
<br />The ICii•tiey series consists of moderately deep, well
<br />rl,•ai»ed soils that formed in material weathered from
<br />-•eddish brown sandstone and shale. These soils are on
<br />uplands and side slopes and are underlain by soft shale
<br />:tt a depth of 20 to 40 inches. Elevation ranges from
<br />5,G00 to 6,400 feet. Slopes are 3 to t5 percent. The
<br />native vegetation is :mainly blue grams, side-oats
<br />l:t•ama, western wheat,grass, yucca, and rabbitbrush.
<br />ilte:in ~tririual precipitation ranges from 15 to 18
<br />inches, mean annual air temperature ranges from 47°
<br />to 50' F, and the frost-free season ranges from 115
<br />to l30 da~•s.
<br />1 n r- representative profile the surface layer is red-
<br />rlislt lii•o«•ii loam about: 4 inches thick. The subsoil is
<br />reddish hrown heavy loam about 19 inches thick. Be-
<br />I~~~~• tl„s is light reddish bio~vn loam about 8 inches
<br />thick that is underlain by soft sandstone and shale.
<br />Permeability is moderate, and the available water
<br />r~U~u•itp is medium. Reaction is mildly alkaline.
<br />'Chess soils are used mainly for native grasses.
<br />Iteli,•esentative profile of Kirtley loam in an area of
<br />Kirtley-Turner complex, 5 to 20 percent slopes, in
<br />native gr•~,ss. fi0 feet south of access road in sec. 14,
<br />T. 10 \., R. 70 W.:
<br />Al-0 to 4 inches; reddish -brown (5YR 5/3)
<br />loam, dai:k reddish brown (5YR 3/3)
<br />33
<br />moist; moderate fine granular struc-
<br />ture ; slightly hard friable ; mildly alka-
<br />line; abrupt smooth, boundary.
<br />B21t-4 to 11 inches; reddish brown {2.5YR 4/3)
<br />heavy loam, dark reddish brown (2.5YR
<br />3/3) moist ; moderate very fine subangu-
<br />lar blocky structure; hard, friable; thin
<br />nearly continuous clay films ; mildly al-
<br />kaline; clear smooth boundary.
<br />B22t-11 to 18 inches; reddish brown (2.5YR
<br />5/4) heavy loam, dark reddish brown
<br />(5YR 3/4) moist; moderate fine pris-
<br />matic structure parting to moderate me-
<br />dium subangular blocky; hard, friable;
<br />thin nearly continuous clay films;
<br />mildly alkaline; clear smooth boundary.
<br />Clca-18 to 26 inches; light. reddish brown
<br />(2.5YR 6/4) loam, reddish brown
<br />(2.5YR 4/4) moist; massive; hard, fri-
<br />able; visible calcium carbonate as seams
<br />and streaks; strongly effervescent; 25
<br />percent weathered red sandstone chan-
<br />ners ; moderately alkaline; abrupt
<br />smooth boundary.
<br />C2r-26 to 60 inches ; red sandstone.
<br />Thickness of the mollic epipedon ranges from. 7 to
<br />15 inches. The A horizon is loam or fine sandy loam
<br />3 to 6 inches thick. The B horizon is loam or light clay
<br />loam 9 to 24 inches thick. The A and B horizons range
<br />from neutral to mildly alkaline. Content of rock frag
<br />menu ranges from 0 to 15 percent in the A and B
<br />horizons.
<br />57--Kirtley loam, 3 to 9 percent elopes. This gently
<br />sloping or strongly sloping soil is o,i uplands and
<br />valleysides. This soil has a profile similar to the one
<br />described as representative of the series, but the com-
<br />bined thickness of the surface layer and subsoil is
<br />about 20 inches and depth to sandstone is about 30
<br />inches.
<br />Included «•ith this soil in mapping are some small
<br />areas of outcrops and some small areas of soils in
<br />which sandstone fragments are in the profile. Also
<br />included are small areas of soils that are more sloping
<br />or less sloping and small areas of Harlan and Purnei•
<br />soils.
<br />Runoff is medium to rapid, and the hazard of ero-
<br />sion is severe.
<br />This soil is well suited to pasture and native grasses
<br />under dryiand management. It is less well suited to
<br />wheat and barley. If irrigated, it is suited to bailey,
<br />wheat, and alfalfa. It is also stilted to pasture. Capa-
<br />bility units IVe-1, irrigated, and IVs-3, dryiand ;
<br />Loamy Foothill range site; not assigned to a ~~•ind-
<br />bt•eak suitability group.
<br />58--Kirtley-Purnei complex, S to 20 percent elopes.
<br />This complex consists of stro,igl~• sloping to niodei•-
<br />ately steep soils on uplands and yells}•sides. It is about
<br />45 percent Kirtley loam and about 40 percent Purser
<br />fine sandy loam. Kirtley loam is smoother and less
<br />sloping, and Purnei- soil is steeper. The Kirtley soil
<br />has the profile described as representative of the Kirt-
<br />ley series. The Purnei soil has a profile similar to the
<br />one described as representative of the Purnei series.
<br />Included with these soils in mapping are some small
<br />P ~~
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