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,,... .~.~~- -a_~.~.._,.._.,.... - _
<br />BOIILDER COW+ TY AREA, COLOR:IDO
<br />that hate scattered ~ acel and cobbles on the surface.
<br />These included soils make rap about °_0 percent of each
<br />mapped area.
<br />Runoff is medium on this soil. Permeability is slow.
<br />The erosion hazard is moderate.
<br />i\Iost of the acreage of this soil is used for irrigated
<br />crop= and pasture. anti the rest is used for dn~land crops.
<br />A few very small areas are used for range. (Capability
<br />units IIo-l, irrigated, and IIIs-i, nonirrigated: tree
<br />suitability group 3)
<br />Nunn clay loam, 3 to S percent slopes INuCI•-This
<br />soil is in the central part of the Area. In most places
<br />it occurs as areas more than `?0 acres in size. In a few
<br />places this soil Itas scattered gravel anti cobblestones on
<br />the surface.
<br />The profile of this soil is mtlclt like the one described
<br />as representatite for the series, but the subsoil is about
<br />12 laths of clot. Lime is at a depth of about 16 inches.
<br />Included with this soil in mapping are a few areas of
<br />a Nunn-like sail that has shale between depths of -40 and
<br />60 incites. Also included are a few small areas of Kim
<br />soils and Slltall areas of Vutln clay loam, i to :3 percent
<br />slopes. These included soils make up about 15 percent
<br />of each mapped area.
<br />Runoff is medium on this soil. The permeability of
<br />the subsoil is slow. The erosion hazard is moderate.
<br />Most of the acreage of this soil is used for irrigated
<br />and ch•cland crops and far pasture. Some areas near
<br />Longmont are being concerted to urban uses. (Capability
<br />traits IIIe-4, irrigated, and IIIe-7, nonirrigated: tree
<br />suitability group 3)
<br />Nunn clay loam, 5• to 9 percent slopes INuDI.-This
<br />soil is in the central part of the Area. i+'Iost. areas are
<br />more than ?0 acres in size and are irregttlar]y shaped. 7n
<br />a few ;mall places tbis soil has gravel and•cobblestones
<br />on the surface.
<br />The profile of this soil is ranch like the one described
<br />as representatite for the series. but the surface layer
<br />is about S inches of clay loam. The subsoil is about 6
<br />inches of noncalcareous-clot underlain with about °_4
<br />inches of calcareous clay loam.
<br />Included with this soil in mapping are some areas
<br />of a Vann-like soil that has shale or sandstone between
<br />depths of ~0 to 60 inches. Also included are small areas
<br />of Iiim soils; small areas of Nttnn clay loam, 3 to 5 per-
<br />cent slopes; and a few small areas of Kutch clay loam,
<br />3 to 9 percent slopes These included soils make up
<br />about 15 percent of each mapped area.
<br />Rnnolf is rapid on this soil. The permeability of the
<br />subsoil is slow. The erosion hazard is high.
<br />JL~st of the acreage of this soil is used for irrigated
<br />and dreland crops and for pasture. (Capability units
<br />IVe-1. irrigated, anti VIe-1, nonirrigated: tree sltitabil-
<br />itv troop 3)
<br />Nunn-Kim complex (0 to 3 percent slopes) (Nvl•-
<br />This complex is in the eastern part of the Aren. This
<br />complex consists of abort 50 percent Vunn soils and
<br />about. :', percent Iiim soils. Nunn soils are on the smooth-
<br />er parts :f the complex. Kim soils are on the less n-mooth
<br />parts, m• het are where extensive land IevelinP has been
<br />performer..
<br />Nunn s~~ is bare a profile much like the one described
<br />as repre=_r~ ,tire for the series, Intt in some places the
<br />surface Int. ~- Is a sandy clay lo:un.
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<br />Iiim soils have a profile much li]:e that described as
<br />representative fol• t.ite series, but in some places the sur-
<br />face later is a sandy clay loam.
<br />Included With this complex in mapping are areas of a
<br />sail hayint a surface ]aver that is thicker or thinner
<br />as a result of leveling. Also included are small wet areas
<br />that have a water table between depths of ~; and 5 feet.
<br />These included soils amount to about 15 percent of each
<br />mapped area.
<br />Runod is medium on this complex. 1'he erosion hazard
<br />is moderate.
<br />This complex is used for irrigated crops and pasture.
<br />(Capability unit IIe-1, irrigated; tree suitability group
<br />3)
<br />Otero Series
<br />The Otero series is made up of deep. sell-drained soils.
<br />These soils fot•med on terraces, rolling uplands, and val-
<br />ley side slopes in loamy a]hn-inm and wind-laid materials.
<br />Slopes are 0 to ?0 percent. Elevations ire L900 to 5x00
<br />feet. The nntit-e vei:etatimt is mainly mi~:l and tall grasses.
<br />Annual precipitation is 14 to 1S inch.es. Jfean annual
<br />air temperature is -1S° to 53° F., and the from-free season
<br />is about i-10 to 155 days.
<br />In a representative profile the surface layer. about 6
<br />inches thick. is strongly calcareous. brown sands loam.
<br />Below this is pale-brown sandy loam about 6• inches
<br />thick. The ttnderl}'ing materiah is stronth- calcareous.
<br />light yellowish-brown sandy loam that~ertends to a
<br />depth of 60 inches or more The upper r art of the under-
<br />lying material contains some soft lime segregations. Soil
<br />reaction is moderately alkaline.
<br />Otero soils hate moderately rapid permeabilit}•. Ava,il-
<br />abl~ water capacity for the profile is moderate. Roots
<br />can penetrate to a depth of 60 inches or more.
<br />These soils me used for irritated and dn-land crops
<br />and for pasture.
<br />Representatite profile of Otero saudc loam in Ascalon•
<br />Otero complex- 9 to 20 percent slopes. located 1,300 feet
<br />west and 351) feet north of the southeast corner of sec.
<br />0, T. i N., R. 6~ ~V.
<br />Ap--0 to 8 inches, brown (lOYR S/3) sandy loam, brown
<br />(lOYR 4/3) when moist; weal:. fine. crumb struc-
<br />ture; soft. verT friable; stronglS calcareous; mod-
<br />erately alkaline: clear. smooth boundary.
<br />AC--B to 13 inches. pale-brown llOYR 8/31 sandy, loam,
<br />brawn (lOYR 4!3) when moist: v; ea L-, medium, sub-
<br />angular blocky structure; slightly hard. racy Srtable;
<br />strongly talc, [eons with Yew, fine .tad medium, prom-
<br />inenC. white (lOFR 8/^-), soft lime segregations:
<br />moderately alkaline; clear, smooth t~oundarp.
<br />C1-12 to 38 inches. light yellowish-brown (lOYR 6/i) sandy
<br />loam, yellowish brown (lOYR &/-4) when moist;
<br />weak. medium, subangular blocky structure; hard.
<br />very triable; strongly calcareous; moderately alka-
<br />line; clear. smooth boundary.
<br />C°_-38 [n 80 inches, light yellowish-Drown (lOYR 8/4) sandy
<br />loam. yellowish brown (lOYR 5/i) when moist;
<br />massive: hard, very triable; strongly calcareous:
<br />moderately alkaline.
<br />The A horizon ranges from 8 to 14 inches in thickness. The
<br />structure rnnGes Crom Granular or crumb G. weak aubnn;ltlar
<br />blocky. 7n most places the C horizon Is sandy loam or flue
<br />sandy loom. Depth to bedrock is more than 80 inches, bat
<br />in some places it is between depths oC d0 and 80 Inches.
<br />These soils are calcareous throughmrt the profile. although the
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