|
a,o Blanco County Area, Colorado
<br />
<br />its i crease .Therefore,
<br />snag so hat the desir
<br />i:; mam ed in the pla[
<br />Ma gem t practices s tab for use n this uni are
<br />uoper ng se, deterre grazin rot on grazin ,and
<br />uush m e ent. Cira ' g shoud a elayed u it the
<br />;oil in thi nit is firm a the more sirable for ge
<br />plants h achie d fficient gro th o withs nd
<br />3razing res ure. L lock grazi sho be anaged
<br />o pro ct the oil fr t excessiv erosion,
<br />If t is unit is ee c the ma' limitations re low
<br />re nation in mer, alkali tty, and the a and of
<br />~ro ion. For succ ssiul a ng, prepare se bed and
<br />in the seed. a plan selected for eedin should
<br />t the seas al quir nts of live lock or w life,
<br />~ b h. Salt- nd al li- ter nt grass s are bests 'led
<br />o this nit.
<br />If this nit s used f irrigate ha and pasture, the
<br />rain limit ns are ;i ty and liniry, slow
<br />ermeabili and d' icul of brus removal. For good
<br />stablish en of y and slur epare a seedbed,
<br />gill in t see nd uses ple en I irrigation. Furrow,
<br />order, orruga n, and spri kl r irrig ion systems are
<br />oiled o this u it. Leveling he s to ins re the uniform
<br />pplic lion of ate Water n s to be plied at a slow
<br />ate er a I ng pert d to in r that the of zone is
<br />rop rly w led.
<br />U e of trogen and I o phoru fertilizer romotes
<br />o d gro h of forage pl ts. Prop r stockin rates,
<br />a lure oration, and rest c d grazi during et
<br />nods elp to keep tha asture in g d Condit nand
<br />~ pro ct the soil from rosion.
<br />T map unit is in ca ability subclass s IVs, irrigated,
<br />nd Vlls, nonirrigated. It is in Alkaline Slo s range site.
<br />To~ u nts, Illed This ap unit is along
<br />arro Iley ottom , in swales and on ero d fans.
<br />lop rs t per nt. Areas re to g an arrow or
<br />ular i sha nd a e 4 t 200 r in s' e. The
<br />true v e ti is mat. spar de shr sand
<br />Sri a gr s . E vati s 5,10 7, feet. The
<br />ver an al re tttio is 16 i es, the
<br />w g n al a pest is 4 50 grees F,
<br />d the ra a t- :e r d is to 130 ys.
<br />Thi ni 6 er n^ orrifl Is at are
<br />far cterize Ilie an he is 3 35 feet p
<br />[0 1 \
<br />om
<br />and
<br />fillings s c loam, Chi to ry la o~rtr, Glenton
<br />tndy loa ay loam, Tis rth f' sand oam,
<br />vrley fin' sa m, a Uffens loa
<br />73
<br />is moderaSefGrapid to
<br />60 inc r~ Hoff is
<br />erosjp very hi
<br />of
<br />but a fea~re3reas amused for
<br />map uni capa~iliip class Vlll.
<br />A7$i!Co~Iprth~p-Poek ou~p complex, 1b to 91
<br />penaw~telopee. This map unit is in extremely rough and
<br />eroded areas on mountains, hills, ridges, and
<br />canyonsides. Slopes mainly face south. The native
<br />vegetation is mainly sparse shrubs and grasses with
<br />some pinyon and juniper trees. Elevation is 5,100 to
<br />7,500 feet. The average annual precipitation is 8 to 18
<br />inches, the average annual air temperature is 40 to 50
<br />degrees F, and the average frost-free period.is 70 to 130
<br />days.
<br />This unit is 50 percent Torriorthents that have slopes
<br />of 15 to 65 percent and 30 percent Rock outcrop that
<br />has slopes of 35 to 90 percent (fig. 6).
<br />Included in this unit are small areas of Barcus
<br />channery loamy sand, Glendive fine sandy loam, Havre
<br />loam, Moyerson stony clay loam, Nihill channery sandy
<br />loam, Patent loam, Redcreek sandy loam, Rentsac
<br />channery loam, Sinkson gravelly sandy loam, and
<br />Blazon, Castner, and Clifterson channery foams.
<br />Torriorthents are very shallow to moderately deep and
<br />are well drained and somewhat excessively drained.
<br />They formed in residuum and colluvium derived
<br />dominantly from sandstone, shale, limestone, and
<br />siltstone. Torriorthents are highly variable. No single
<br />profile of Torriorthents is typical, but one commonly
<br />observed in the survey area has a surface layer of pale
<br />brown channery loam about 3 inches thick. The
<br />underlying material is very pale brown channery loam,
<br />very channery loam, or fine sandy loam about 13 inches
<br />thick. Shale or sandstone is at a depth of 16 inches.
<br />Torriorthents are calcareous throughout. In some areas
<br />the surface layer is stony or flaggy.
<br />Permeability of the Torriorthents is moderate. Available
<br />water capacity is very low. Effective rooting depth is 10
<br />to 20 inches. Runoff is very rapid, and the hazard of
<br />water erosion is very high.
<br />Rock outcrop consists of barren escarpments, ridge
<br />caps, and points of sandstone, shale, limestone, or
<br />siltstone. The escarpments are 3 to 50 feet thick and 25
<br />to 2,500 feet long.
<br />Most areas of this unit are used for wildlife habitat and
<br />livestock grazing.
<br />The potential plant community on this unit is mainly
<br />some pinyon and juniper trees with Indian ricegrass,
<br />beardless wheatgrass, prairie junegrass, low rabbltbrush,
<br />and some fortis. Many areas have sparse stands of
<br />
|