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LARIMER COUNTY AREA. COLORADO
<br />dryland management it is suited to pasture and native
<br />grasses. Capability units IIIe-2, irrigated, and IVe-3,
<br />dryland ; Loamy Plain:. range site;, windbreak suit-
<br />ability group 1.
<br />55--Kim loam, 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 Thedalund soils.
<br />Runoff is rapid, and l;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 />land management it is suited to pasture and native
<br />grasses. Capability unil;s IVe-1, irrigated, and VIe-1,
<br />dryland ; Loamy Ylain:~ range site ; windbreak suit-
<br />ability group 1.
<br />56--Kim=Thedalund loame, 3 to )l5 percent elopes.
<br />This complex consists c-f gently sloping to moderately
<br />steep soils on uplands, fans, and valleysides. It is about
<br />95 percent Kim loam a~:nd about 35 percent Thedalund
<br />loam. Kim loam is snoother 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 the surface layer is about 4 or 5
<br />inches thick.
<br />Included with these soils in mapping are a fe~v small
<br />areas of Renohill and :Midway soils, a fe~v small out-
<br />c-•ops and gravel knobs, and some small seep spots.
<br />Runoff is rapid, and the hazard of erosion is severe.
<br />These soils are mainly used for pasture and native
<br />grasses. Capability unit: Vte-1, dryland; Loamy Plains
<br />i•~nge site; windbreak .>uitability group 1.
<br />Kirtley Series
<br />The ICirttey series cansists of moderately deep, well
<br />drained soils that formed in material weathered from
<br />reddish brown sandstone and shale. These soils are on
<br />uplands and side slopes and ai•e underlain by soft shale
<br />:tt a depth of 20 to 40 inches. Elevation ranges from
<br />s>,G00 to 6,400 feet. Slopes are 3 to 1!5 percent. The
<br />n~itive vegetation is .mainly blue grams, side-oats
<br />gi•ama, western wheatgrass, yucca, and rabbitbrush.
<br />l~lean annual precipitation ranges from 15 to 18
<br />inches, mean annual air temperature ranges from 47°
<br />to :50° F, and the fro~;t-free season ranges from 115
<br />l0 130 days.
<br />In ri i•elrresentative profile the surface layer is red-
<br />dish bt•o«•it loam about; 4 inches thick. The subsoil is
<br />~~eddish brown heavy loam abotiE 19 inches thick. Be-
<br />Imv this is Light reddish brown loam about 8 inches
<br />thick that is underlain b}~ soft sandstone and shale.
<br />Permeability is moderate, :ind the available water
<br />calr-cit}~ is medium. Reaction is mildly alkaline.
<br />'Chess soils as•e used ;mainly for native grasses.
<br />Representative profile of Kirtley loam in an area of
<br />Kirtle}•-Purner complex, 5 to 20 percent slopes, in
<br />r~;iti~•e g:•~iss. ?0 feet south of access road in sec. 14,
<br />T. 10 \., R. 70 W.:
<br />A 1'--U to 4 inches; reddish brown (5YR 5/3)
<br />loam, dank reddish brown (5YR 3/3)
<br />33
<br />moist; moderate fine granular struc-
<br />ture; slightly hard friable; mildly alka-
<br />line; abrupt smoot~i 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 subangu)ar 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 ; led sandstone.
<br />Thickness of the mollic epipedon ranges front 7 to
<br />15 inches. The A horizon is loam or fine sandy loam
<br />3 to 6 inches thick. The B horixon is loam or .light clay
<br />loam 9 to 20 inches thick. The A and B hot•izons range
<br />from neutral to mildly alkaline. Content of rock frag
<br />meets ranges from 0 to 15 pet•cent tin the A and B
<br />horizons.
<br />57-Kirtley loam, 3 to 9 percent elopes. This gently
<br />sloping or strongly sloping soil is on uplands and
<br />valleysides. This soil has a profile similat• 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 with 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 Purner
<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 nati~>e grasses
<br />under dryland management. It is less «'ell suited to
<br />wheat and barley. If irrigated, it is suited to bailey,
<br />wheat, and alfalfa. It is also suited to pasture. Capa-
<br />bility units IVs-1, irrigated, and IVs-3, dryland;
<br />.Loamy Foothill range site; not assigned to a ~~•ind-
<br />break suitability group.
<br />58---Kirtley-Purner complex, S to 2Q percent elopes.
<br />This complex consists of strongl~• sloping to ntodet•-
<br />ately steep soils on uplands and ~•alle}•sides. It ;s about
<br />45 percent Kirtley loam and about 40 percent Purner
<br />fine sandy. loam. Kirtley loam is smoother and less
<br />sloping, and Purner soil is steeper. The Kirtley soil
<br />has the profile described as rept•esentattve of the Kirt-
<br />ley series. The Purner soil has a profile similar to the
<br />one described as representative of the Purner series.
<br />Included with these soils in mapping are some small
<br />P °~~
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