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20
<br />Nunn Series
<br />SOII. 9IIRVEY
<br />The ~Tttnn series is made tip of deep, well-drained soils.
<br />These soils formed on terraces and valley side slopes in
<br />loamy alluvium. 3lupes are 0 to 9 percent. Elevations are
<br />4.900 to 5.500 feet. 'Ilia notice ce_elation is mainly short
<br />and mid grasses. ~nnlta] precipitation is 12 to 18-inches.
<br />D1ean annual air temperature is 48° to 52° F:, and the
<br />frost-free season is about 140 to 155 days.
<br />In a representative profile the surface layer is ~nyish-
<br />bmwn clay loam about 10 inches thick. The subsoil, about
<br />20 inches thick, is brown and very pale brown clay that
<br />grades to clay loam. It is noncalcareous in the upper part,
<br />bttt contains soft lime segre:ations in the lower part. The
<br />substratum is stron_ly calcareous, very pale brown clay
<br />loam estendin_ to ;r depth of 60 inches or more. In the
<br />surface layer, soil reaction is neutral. In the upper part
<br />of the subsoil. it is mildly alkaline, and in the lower part
<br />of the subsoil and in the stlbstratttm it is moderately
<br />alkaline.
<br />Vtlnn soils have slow and moderately slow permeabil-
<br />ity. available water capacity for the profile is high. Roots
<br />can penetrate to a depth of 60 inches or more.
<br />The ncrea~e of these soils is used mainh• for irrigated
<br />and dryland crops and for pasture.
<br />Representative profile of \ unn clay loam, 0 to 1 percent
<br />slopes, located 1 '°_0 feet east and ~ 1,000 feet north of
<br />center of sec. 7, T. ? V., R. 69 N.:
<br />App [0 10 inches, grayish-brown f10YR 5/31 clay loam, very
<br />dnrl: ~taclsh brown (lOYR 3/^_) when moist; weak.
<br />medium. subangular blxky structure that parts to
<br />weak. floe. granular: hard. 8rm; neutral; ei~r.
<br />smooth boundary.
<br />B21t-10 to iS Inches. brown (lOYR 9/31 clay. dark brown
<br />(lOYR 3/3) when moist; moderate. medium, pris-
<br />matic structure that parts to strong, medium and
<br />fine, an_ular and subangular blxky: verc hard, very
<br />arm: thin, continuous clay dims an pad fovea; mildly
<br />alkaline: clear. wavy boundary.
<br />B2^tca-1S to ?3 inches, brown (lOYR 5/3) clay, brown
<br />(lOYR 9/3) when moist; moderate. medium. pns-
<br />ma[Ic structure that pans to moderate. medium. sttb-
<br />angular blxky; very bald. vet? arm; tLin. nearly
<br />contlnuotrs clay films on pad faces; strongly calcare-
<br />ous. with few, fine and medium. prominent. white
<br />(lOYR S/.1 lime segregations; moderately alkaline:
<br />clear, wavy boundary.
<br />H3tca-23 to 3n inches, very onle brown (lOYR 7/3) clay
<br />loam, brotrn (lOYR 5/3) when moist: week. coarse.
<br />prismatic structure that putts to moderate. medium.
<br />subnngular blxky; hard, firm: few, patchy clay
<br />alma on pad faces; strongly ©ICareotts. with few.
<br />fine and medium. prominent, white (lOYR S/"_1 lime
<br />segregatlons; moderatelT alkaline: gradual, wavy
<br />boundnry.
<br />Cca~O to 60 inches, very pale brown (lOYR i/9) clay
<br />loom. Sallowish brown (lOYR 5/9) when moist;
<br />massive: slightly hard, friable; strongly mlmreous;
<br />moderately alkaline.
<br />The A horizon ranges Irom 8 to 19 Inches fn thickne~ and
<br />from sandy clay loam [o clay loam In texture. The B2t hori-
<br />mn rouges from 9 to 15 Indres in thickness and from heavy
<br />clay loam to clay in texture. Depfb to calcium carbonate ar
<br />cumulation ranges frem 19 to 30 inches. The C horimn sages
<br />from heavy loam to clay loam in texture. Typically tLe sand
<br />and grave! substratum Is below a depth of a0 incLes, but in
<br />places it Is between depths o[ i0 and 80 inches. As a result
<br />of excessive trrigatlon in some areas, a water table is present
<br />at a depth of between 3 and 5 fee[.
<br />Nunn sandy clay loam, 0 to 1 percent slopes (NnAI.-
<br />This soil is thrott=hoot the eastern part of the Area. It
<br />occurs as irregularly shaped areas more than 30 acres in
<br />size.
<br />The profile of this soil is mtlc}t like the one described
<br />as representative For the series, bttt the surface lacer is
<br />about 10 inches of sanclr• clay loam. The subsoil is about
<br />6 inches of clay underlain b_v about 42 inches of calcar-
<br />eous clay loam.-
<br />Included with this soil in mapping are small areas of
<br />Vtlnn clay loam, 0 to 1 percent slopes: Ascalon sandy
<br />loam, 0 to 1 percent slopes; and Iiim soils. Tlte=_e includ-
<br />ed soils make tip about 10 percent of each mapped area.
<br />Runoff is slow on this soil. Permeability is moderately
<br />slow. ~1ltliouglr the erosion hazard is slight, this soil
<br />should be protected from soil blowing during periods of
<br />strong winds.
<br />almost al] of the acreage of this soil is used for irri-
<br />gated crops. ~ few areas are ttsecl for irritated pasture.
<br />(Capability unit I, irrigated: tree suitability group 3)
<br />Nunn sandy clay loam, 1 to 3 percent slopes (NnBI.-
<br />This soil is in the eastern part of the area. In most
<br />places it occurs as iiree tlarly shaped areas more than 20
<br />acres in size.
<br />The profile of this soil is much like the one described as
<br />representative for the series, but the surface layer is
<br />about 10 inches of sandy clay loam. The s-ubsoi] is about
<br />4 inches of clay ttnder]uin by about °_0 inches of calcar-
<br />eous clay loam.
<br />Included with this soil in mappin_ are some small areas
<br />of Kim soils: \TUnn clay loam, 1 to 3 percent slopes:
<br />Ascalon sandc loam. 1 to 3 percent slopes; and Tt'eld fine
<br />sandy loam, 1 to 3 percent slopes. These included soils
<br />make up about 15 percent of each mapped area.
<br />Runoff is medium on this soil. Permeability is moder-
<br />ately slow. The erosion hazard is moderate.
<br />?.lmost all of the acreage of this sail is used for irri-
<br />gated crops, but a few small areas are used for irrigated
<br />pastures. (Capability unit IIe-2, irrigated; tree suitabil-
<br />ity croup 3)
<br />-Nunn clay loam, 0 to 1 percent slopes INuAI.-This
<br />soil is in the eastern part of the area. In most places it
<br />is in irregular areas more than °_0 acres in size. This soil
<br />]ras the pt•ofile clescriberl as representative for the series.
<br />Included with this soil in mappin; are small areas of
<br />Vunn sandy clay loam, 0 to 1 percent slopes: and Vann
<br />clay loam. 1 to 3 percent slopes. ->,lso included are a few
<br />small areas of Vunn clay loam. 0 to 1 percent slopes, that
<br />have a seasonal hieh water table. These included soils
<br />make up about 15 percent of each mapped area.
<br />Runoff is slow on this sail. Permeability is slow. The
<br />erosion hazard is slight.
<br />almost all of the acreage of this soil is used for irri-
<br />gated crops, brit a few small areas are used for irrigated
<br />pasture. (Capability unit IIs-1, irrigated; tree suitability
<br />group 3)
<br />Nunn clay loam. I to 3 aercent slopes iNUBI.-This
<br />soil is in the eastern part of the .1rea. In most places
<br />it occurs as irregularly shaped areas more than 40 acres
<br />in size.
<br />Included with this soil in mapping are small areas
<br />of Kim soils; Vttnn sandc clay loam, 1 to 3 percent
<br />slopes; Vunn clay loam, 0 to I percent slopes: and Val-
<br />mont clay loam. 1 to 3 percent slopes. also included
<br />near dninagewavs ale small wet areas and a few areas
<br />
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