|
<br />TABLE l,--APPROXlMATE ACREAGE AND PROPORTICNATE EXTENT OF THE SOILS--Continued
<br />
<br /> Soil Area Extent Soil Area Extent
<br /> Acres Percent Acres Percent
<br /> - -
<br />Rocky Ford 5 il ty clay loam, wet, Travessilla 5 andy loam. 1 to 9
<br />1 to 3 percent slopes- -------- 1,528 0.2 percent slopes---------------- 28,850 3.6
<br />Rocky Ford silty clay loam, Travessilla-Rock outcrop com-
<br />limestone substratum, 0 to 1 plex-------------------~------ 16,412 2.0
<br />percent slopes---------------- 1,731 .2 'TYrone silty clay loam, 0 to
<br />Rocky Ford silty clay loam, 3 percent slopes-------~------ 47,746 5.9
<br />limes tone substrat\.U!l, 1 to 3 Vana sandy loam, 1 to S percent
<br />percent slopes---------------- 5,086 ,6 slopes------------------------ 33,294 4.1
<br />Rocky Ford loam, sand subsoil Gravel pits, blowouts, lime and
<br />variant, 0 to 3 percent cinder dumps, and sewage
<br />slopes------------------------ 1,635 ,2 lagoons----------------~------ 776 .1
<br />Samsil-Shale outcrop complex---- 1,069 .1
<br />Shingle loam, 1 to 9 percent Total----------------.------ 810,880 100.0
<br />slopes------------------------ 20,430 2,6
<br />Shingle loam, gypsum variant, 1/ ,
<br />1 to 9 percent slopes---- - ---- 8S5 ,1 -Less than O.OS percent.
<br />
<br />Apishapa Seri es
<br />
<br />The Apishapa series consists of nearly level,
<br />somewhat poorly drained, slightly saline, clayey
<br />to sandy soils on low terraces of the Arkansas
<br />River and other streams. Apishapa soils are not
<br />extensive in the county.
<br />In a typical profi Ie the surface layer, about
<br />12 inches thick, is grayish-brown clay. It is mod-
<br />erately high in content of organic matter. The next
<br />layer, about 4 inches thick, is dark grayish-brown
<br />clay. Below a depth of about 16 inches is dark-gray
<br />clay having olive-b~own, dark yellowish-brown, and
<br />gray mottles. Thes~ mottles are a sign of poor
<br />drainage. Beginnin~ at depths of about 55 inches
<br />the material is stratified, yellowish-brown and
<br />dark grayish-brown, wet sand and loamy sand. In
<br />most places, the depth to the water table coincides
<br />with the depth to sand.
<br />Apishapa soils a~e subject to occasional flooding.
<br />Drainage ditches are needed in cuI ti vated areas.
<br />The subsoil is slowly penneable and poorly aerated.
<br />Because of the mode~ately high organic-matter con~
<br />tent, these soils a~e somewhat easier to work than
<br />most clayey soils.
<br />Nearly all the acreage is used for irrigated
<br />crops. Salt-tolerent crops grow well, providing
<br />good management is used.
<br />Typical profile of Apishapa clay in an irrigated
<br />field, 0.4 mile north of the center of sec. 34,
<br />T. 22 S., R, 57 W,
<br />
<br />ApI--O to 7 inches, grayish-brown (IOYR S/2) clay,
<br />dark grayish brown (IOYR 4/2) when moist;
<br />moderate, coarse, crumb structure that parts
<br />to moderate, fine, crumb; very hard when dry,
<br />firm when moist, sticky when wet; strongly
<br />calcareous, pH 7.7; clear, smooth boundary.
<br />
<br />6
<br />
<br />Ap2--7 to 12 inches, grayish-brown (IOYR S/2) clay,
<br />dark grayish-brown (IOYR 4/2) when moist;
<br />weak to moderate, coarse, subangular blocky
<br />structure; very hard when dry, very firm when
<br />moist. sticky and plastic when wet; strongly
<br />calcareous, pH 7.7; clear, smooth boundary.
<br />AC--I2 to 16 inches, dark grayish-brown (IOYR 4/2,
<br />moist) clay; weak, coarse, subangular blocky
<br />structure; very fiI1n when moist, plastic and
<br />sticky when wet; thin continuous clay film on
<br />vertical and horizontal ped surfaces; strongly
<br />calcareous, pH 7.7; clear. smooth boundary.
<br />Clcsg--I6 to 32 inches, dark-gray (lOYR 4/1, moist)
<br />clay; massive; very firm when moist. plastic
<br />and very sticky when wet; common, small,
<br />distinct. olive-brown (2.5Y 4/4, moist) mot-
<br />tles; thin continuous clay films on ped sur-
<br />faces; numerous small gypsum crystals; strong-
<br />ly calcareous. pH 7.6; gradual, smooth bound-
<br />ary,
<br />C2csg--32 to SS inches, dark-gray (2.5Y 4/0, moist)
<br />clay; massive; very firm when moist, very
<br />plastic and very sticky when wet; many, medium,
<br />distinct, dark yellowish-brown (IOYR 4/4,
<br />moist) and gray (lOYR 5/1, moist) mottles;
<br />numerous small gypsum crystals; strongly cal-
<br />careous, pH 8.0; clear. smooth boundary.
<br />I1C3g--55 to 60 inches, dark grayish-brown (2.5Y 4/2,
<br />moist) loamy sand; massive; friable when moist;
<br />many, medium, distinct, yellowish-brown (lOYR
<br />5/6, moist) mottles; strongly calcareous.
<br />
<br />The A horizon is typically clay, but ranges from
<br />clay to loamy sand. The depth to mottles ranges from
<br />about 15 to 30 inches. Depth to the sandy I IC hori-
<br />zon ranges from 42 to 72 inches. The A horizon is
<br />only mildly saline. The C horizon becomes more
<br />
|