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<br />ADA;VIS COtiSTY, COLORADO
<br />Representative profile of Dacono loam, 0 to 1 percent
<br />slopes, in a cultivated field, Q3 mile south and 155 feet
<br />west of the northeast corner of section 13, T. 1 S., R.
<br />67 {V.:
<br />dpI-0 [o v iaches, grayish-brawn (lOTR v/2) Loam, very
<br />dark grayish brunu IIOYR 3!2) when moist; weak,
<br />wediuut, subangutar blocky structure partiug to mod-
<br />erately fine, grumlar structure; slightly haul, fri-
<br />able: uoncalrtrenus; neutral; clear, smooth bound-
<br />ary.
<br />~p?-v to 0 inches, dark grayish-brown f.IOYR 8M) heavy
<br />loam, (lU percent fine gravel), eery dark grayish
<br />brown (IOYR 3/::) when moist; weak, moderate,
<br />suL;utgular blocky structure; slightly hard, friable;
<br />noncalcareous; neutral; clear, smooth botmdary.
<br />B?t-0 to 17 iaches, grayish-brown (lOYR 5/?) clan dark
<br />grayish brown (lOYlt i/?) when moist; moUera[e,
<br />medium, prisumtic structure partiug to strong, fine,
<br />angular auU subangular blocky structure; moderate
<br />coati^uous clay 51tns ou all peds; very harU, firm;
<br />noncalcareous; mildly alkaline; clear, navy Dound-
<br />arq.
<br />Baca-17 to'?? inches, light brownish-gray (lOYR 0/2) sau[lp
<br />c•Iny loam, dark gravish brown (lUYR -1/2) nbeu
<br />moist: Weak, u,edium. suL:wgu L•tr blocky" structure:
<br />Lard, rery friable; rnlcareous and contains calcium
<br />in splotches and dissemiuateU; uoderately alkaline;
<br />dear, Harp botndary.
<br />C1-J'_' to 36 iaches, brown (lOYR /8) coarse sandy clay
<br />loam (lU percent tine and medi[tm gra yel ), dark
<br />brown l1UYH i/Si aiteu moist; massire to Weak,
<br />medium, subangutar bluckq structure; slighUg hard,
<br />friable; calcareous; moderately alkaline; clear, navy
<br />boundary.
<br />C_-^_G to. 8•'~ inches, bronn (7.SY It u/3) rerr coarse loamy
<br />sand t1U percent Que gravel i, dark brunu (i.aYR
<br />i/;i) [rhea uu,is[; wassiye; Lard, cerp Liable; cnl-
<br />carevus; umderately ;Qkaliue; clear, waFy boundary.
<br />IIC3-75 Gt OU inches, IighDLron'n (i.SIIi 6/i) sand and
<br />gravel, dark brunu (i.5YR -k/~1) when moist; single
<br />groin; lausr, calcareous; moderately alkaline.
<br />'the :\ horizon ranges from ~ W 10 iaches iss thickness, from
<br />grayisL brunu to dark grayish brunu iu crolor, and from
<br />louw [u clay loam iu [es[ure. TLe B horizon ranges from
<br />9 to 1S iaches in tLickness. llep[L [o calcareous material
<br />ranges from s [u '•?U inches. Depth to unto^solidateU sand
<br />and gravel is .0 to 36 iaches.
<br />Dacono loam, 0 to 1 percent slopes IDoA).-This soil
<br />has the profile described s represeutative for the series.
<br />It contains 5 to 15 percent gravel in the surface lacer
<br />and subsoil, and it has a scud and gravel layer bettreen
<br />depths of 20 and 40 iaches. Runoff is slop-. The hazard
<br />of water erosimr is slight, but the hazard of soil blow-
<br />ing is moderate if fields are not protected by crops or
<br />residue. Included in mapping at•e some small areas of
<br />Satana loam and a few small gravel spots.
<br />Nearly all of this soil is cultivated and irrigated. The
<br />soil is easy to till and is well suited to truck farming
<br />(fig. 8). Capability trait IIIs-3, irrigated; not placed in
<br />a range site; tree planting suitability group 1.
<br />Dacono loam, I to 3 percent slopes IDoBI•-This soil
<br />has a profile that is similar to file one described as rep-
<br />resentative for the series, but it has a thinner surface
<br />layer and subsoil. Runoff is medium, and the hazard of
<br />water erosion is moderate. The hazard of soil blon•ing is
<br />moderate in unprotected fields.
<br />Most of the soil is cultivated and irrigated. Some of
<br />the steeper areas are used for irrigated pasture. Cap-
<br />ability unit IIIe-2, irrigated; not placed in a range site;
<br />tree planting suitability group 1.
<br />Deertrail Series
<br />13
<br />The Deerh•ail series cmtsists of well-drained, nearly
<br />level soils on uplands. These soils formed in Ivind-de-
<br />positcd loam}' material Lt _ldanr County, they occur
<br />only in a complex With ll"eld soils.
<br />In a represenuttire profile, the surface laver is light
<br />grayish-brown cer\ fine sutdy loam and loam about
<br />0 inches [hick. It is noncalcareous. The upper part of
<br />the subsoil is brnn'n ant! light brow Wish-gi.~y clay about
<br />L inches thin:. It is nmuulrrreous. "I'he lower part of
<br />the subsoil is very pale brown ailty c(ay loam about I1
<br />inches thick. It is highl}' salcnrcous, and much of the
<br />lime is vis-iblc as streaks- and spots. The underlying ma-
<br />terial, below a depth of 33 inches, is highly calcareous,
<br />very pale bronn loam.
<br />Deertrail soils absorb water slowly, and the available
<br />Hater capacity is vet}' low. Perhicability- is slow. Roots
<br />are confined mostly- to Uu• surface layer, and only a
<br />few roots arc iu the subsoil.
<br />Representative profile of a Deertrail rery fine sandy
<br />loam hacin~ a slope of less than 1 percent, m an area
<br />of grass. 1,800 feet south and .5 feet nest of the north-
<br />east coaster of section 1?. T. 3 S.. Pr. 57 1V.:
<br />\_-0 to i inches, light brownish-gray (lOYR 6/2) very fine
<br />sandy loam, Uark grayish brown (lOYR 4/2) when
<br />moist: n'eak. fine, platy structure Parting to week.
<br />fine, granular structure; soft, very friable; aoncal-
<br />wre~us; neutral; abrupt, smooth bnumlary.
<br />3SB-a to 0 inches, light bmnnisL-graS (SOYR 8/2) loam,
<br />dark grayisb brown (lOYR -}/2) When moist; weak,
<br />fine, prismatic structure patting to moderate, me-
<br />dium, subangular blocky structure: hard, frlaDle:
<br />thin patchy clay films: bleached sand grains on sur-
<br />face of peds; noncalcareous; mildly alkaline; abrupt.
<br />swarth bnundarv.
<br />B?St-0 to 17 inches, broa-n (lOFR 5/8) clay, dark grayisD
<br />brown (10 Y"R 3.a/2) when moist; strong, medium,
<br />columnar structure parting to strong, Sne, angular
<br />blocky structure; eery hard, firm; thin continuous
<br />clay films; noncalcareous; moderately alkaline;
<br />gradual, smooth boundary.
<br />R?2C-li [0 21 inches, light brownish-gray (lOYR 6/2) clap
<br />[tack grayish brown (IOYR 4.i/2) ashen moist; mal~
<br />ern [e, medium, prismatic structure pflrting to IDod-
<br />erate to strong, fine, angular and subangular blocky
<br />structure; eery hard, firm ; thin continuous clay
<br />dims; calcareous; very strongly alkaline; clear,
<br />smooth bonndarv.
<br />Baca-21 to 33 inches, very pale brown (lOYR 7/3) slltp
<br />clay loam, brown (lOYR 5/3) when moist; weak,
<br />Figure 3. Intensi.'e truck farming on Dacono soils.
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