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f~MRa COUNTY ARRA, COLORADO
<br />altmall areas of soils that are redder and have
<br />In taper of sandy loam. Also included are small
<br />d Fort Collins, Kim, and Larimer soils.
<br />d b npid, and the hazard of erosion is ae~
<br />Rated, this soil ie well suited to pasturt
<br />ran extenk, wheat. barley, and alfalfa. 1
<br />t aunsgement it is suited to pasture ar i
<br />~ Gpability unite IVe-1, irrigated, and 1
<br />t:laamy Plains range site; windbreak
<br />suit-
<br />tAr Sonahlne series consleta of moderately deep,
<br />~ liaised soils that formed in material weathered
<br />!ta tudstone. These soils are on mountainsides and
<br />rttaad are underlain by sandstone at a depth of 20
<br />ft•:xlua. Elevation ranges from S,b00 to 9,600 feet.
<br />M ue 5 to 16 percent. The native vegetation is
<br />ttaiT Arizona fescue, bluebunch wheatgrass, moun-
<br />fa athly, and big gage. Mean annual precipitation
<br />alga tram 16 to 17 inches, mean annual air temppeera-
<br />w nieaea from 40° to 44° F, and the average frost-
<br />~ aaMn ranges from 60 to 86 days.
<br />Y t npreaentative profile the surface layer is gray-
<br />0 l~raa stony sandy ,loam about 10 inches thick.
<br />tV rthsarfate layer is light gray stony sandy loam
<br />rs S inches thick and brown very stony clay loam
<br />!t s mired with light gray fine sandy loam and is
<br />lint 1 inehm thick. The subsoil is brown very stony
<br />4r tbout 9 inches thick. The underlying material is
<br />atrSered and fractured sandstone.
<br />hreeability is slow, and the available water ca-
<br />tar~ a low. Reaction is neutral.
<br />!bsraoib are used for native grasses.
<br />lrreaentative profile of Sunshine stony sandy
<br />eta S fo 15 percent elopes, in native grass, about 30
<br />fa.eal of road and 0.2 mile north of fence in $Eyy
<br />a f. T. i l N., R. 77 W.:
<br />A1-0 to 10 inches; grayish brown (lOYR 6/2)
<br />stony sandy loam, very dark grayish
<br />brown (lOYR 3/2) moist; weak fine sub-
<br />angular blocky and moderate fine gran-
<br />ular structure; soft, very friable; 10
<br />percent stones; neutral; clear smooth
<br />boundary.
<br />APr-10 to 15 inches; light gray (lOYR 7/2)
<br />stony sandy loam, grayish brown (lOYR
<br />5/2) moist; weak fine aubangular struc-
<br />ture parting to weak fine granular;
<br />slightly hard, very friable; 30 percent
<br />stones; neutral; gradual wavy bound-
<br />5 to 19 inches; brown (7.bYR 6/4) very
<br />stony clay loam, dark brown (7.bYR
<br />4/4) moist; moderate fine angular
<br />blocky structure; hard, friable; this ho-
<br />rizon consists of clays material similar
<br />to that of the B2t hog
<br />mixed with lighter wlo
<br />loam similar to the A2
<br />patchy clay films on pad
<br />cent atones; neutral;
<br />boundary.
<br />ed fine Bandy
<br />horizon; thin
<br />faces; 40 per-
<br />ditfuse wavy
<br />C ,
<br />J
<br />6S
<br />B2t-19 to 28 inches; brown (?.6YR 6/4) very
<br />stony clay, dark brown (7,6YR 4/4)
<br />moist; strong medium aubangular
<br />blocky structure; hard, firm; thin nearly
<br />continuous clay films on pad faces; 40
<br />percent stones; neutral.
<br />Cr-28 to 40 inches; fragmental sandstone.
<br />The Al horizon is sandy loam to loam 6 to 12 inches
<br />thick. The A2 horizon is Bandy loam to light loam 3 to
<br />ti inches thick. The B2t horizon is clay or heavy clay
<br />loam. Reaction ranges from slightly acid to neutral.
<br />Content of rock fragments, mainly flagstones and
<br />stones, ranges from 36 to 80 percent.
<br />104-9umhlne stony sandy Iwm. 5 to 15 peroeut
<br />slopes. This strongly eloping to moderately steep soil is
<br />on ridges and mountainsides.
<br />Included with this soil in mapping are a few small
<br />areas of soils that are more sloping or lees sloping.
<br />Also included are a few small areas of Pendergrass
<br />and Naz soils.
<br />RunotT is medium, and the hazard of water erosion
<br />ie severe.
<br />This soil ie suited to pasture and native grasses.
<br />Capability unit VIe-6, dryland; Subalpine Loam range
<br />site; not assigned to a windbreak suitability group.
<br />Table Mountain Series
<br />The Table Mountain series consists of deep, well
<br />drained soils that formed in alluvium. These soils are
<br />on low.terracea and flood plains. Elevation ranges from
<br />4,800 to 6,600 feet. Slopes are 0 to 1 percent. The
<br />native vegetation is mainly blue grams, bluegrass,
<br />bromegrass, and some forba and shrubs. Mean annual
<br />precipitation ranges from 13 to 16 inches, mesa annual
<br />air temperature ranges from 48° to 60° F, and the
<br />frost-free season ranges from 13b to 1b0 days.
<br />In a representative profile the surface layer is gray-
<br />ish brown loam about 36 inches thick. The underlying
<br />material is brown fine sandy loam about 10 inches
<br />thick and yellowish brown fine sandy loam about 6
<br />inches thick. Below this ie sand and gravel.
<br />Permeability is moderate, and the available water
<br />capacity is high, Reaction is neutral above a depth of
<br />36 inches and moderately alkaline below that depth.
<br />These soils are used mainly for irrigated and dry-
<br />farmed crops. A few areas are in native greases.
<br />Representative profile of Table Mountain loam, 0 to
<br />1 percent slopes, in a cultivated area, about 8b0 feet
<br />east of the west quarter~orner of sec. 20, T. 6 N., R.
<br />saw.:
<br />Ap--O to 4 inches; ra ah brown (30YR 6/2)
<br />loam, very ~ar graylsh brown (lOYR
<br />3/2) moist; weak medium aubangular
<br />blocky structure; slightly hard, iriablo;
<br />neutral • clear smooth boundary.
<br />A1--4 to 36 inc{iee; grayish brown (lOYR 6/2)
<br />loam, very dark grayish brown (lOYR
<br />3/2) moist; weak medium and coarse
<br />aubangular blocky structure; hard, fri-
<br />able; neutral; clear smooth boundary.
<br />Clca-36 to 46 inches; brown (lOYR 6/3) heavy
<br />fine sandy loam, dark brown (lOYry
<br />4/3) moist; massive; slightly hard, very
<br />
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