PERMFILE114566

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Exhibit 70 Appendix M Part 3
• Media Type: D
• Archive: No

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58
On the Shavano soil the native vegetation consists
mainly of shadscale, snakeweed, mat and Gardner salt-
bush, fourwing saltbush, galleta, Indian ricegrass, and
squirreltail (fig. 6).
The Lazear soil is shallow and well drained and over-
lies bedrock at a depth of 10 to 20 inches. It formed in
material that was weathered in place from sandstone
and interbedded shale.
Typically the surface layer of the Lazear soil is light
brownish gray gravelly loam about 4 inches thick. The
underlying material is light brown gravelly loam. Sand-
stone bedrock is at a depth of about 14 inches.
In the Lazear soil, permeability is moderate, and avail-
able water capacity is low. Effective rooting depth is
about 15 inches. Surface runoff is medium. The hazard
of erosion from wind is moderate and from water is
moderate to high.
On the Lazear soil the native vegetation consists
mainly of shadscale, snakeweed, mat and Gardner salt-
bush, fourwing saltbush, galleta, Indian ricegrass, and
squirreltail.
Most areas of this complex are used for grazing by
livestock and wildlife and for recreational purposes.
Because annual precipitation is low and has poor sea-
sonal distribution, these soils are not suited to nonirrigat-
ed crops. However, nonirrigated pasture grasses can be
planted late in summer and in fall to protect the soils
from erosion and to provide limited grazing Tor livestock,
ii good pasture management is practiced. Siberian
wheatgrass, western wheatgrass, Indian ricegrass, and
crested wheatgrass are adapted species.
The potential plant community on these soils consists
mainly of galleta, Indian ricegrass, Gardner saltbush, and
shadscale. As range condition deteriorates, galleta and
Indian ricegrass decrease, fortis and woody shrubs in-
crease, and undesirable weeds and annual plants invade
and become more abundant.
Seeding is advisable if range is in poor condition. Best
results can be expected from sand dropseed, Indian
ricegrass, and thickspike wheatgrass. Irrigation may be
required in newly seeded areas until the plants are es-
tablished. Preparing a seedbed and drilling the seed help
to obtain the best results. Grasses that meet the season-
al requirements of livestock should be selected. Good
range and pasture management is needed to maintain
the grasses.
This soil is used for habitat for pronghorn antelope,
desert cottontail, and mourning dove. Wildlife habitat can
be improved by establishment of wildlife water develop-
ments and food plots in areas where water is available.
If these soils are used for urban development, the
main limitations are depth to bedrock and corrosiviry.
The limitations can be overcome by the use of proper
design and construction methods.
This complex is in capability subclass Vlle, nonirrigat-
ed.
SOIL SURVEY
74-Torriorthents-Haplargids complex, very stony.
The soils in this complex are nearly level to strongly
sloping and are on toe slopes and small fans and in
narrow, winding valleys. They are forming in an accumu-
lation of focally transported stony materials derived from
a variety of rock. Slopes are 0 to 12 percent.
Torriorthents make up about 55 percent of this com-
plex and are lower on the toe slopes than Haplargids
and are in the bottom of small drainageways. Haplargids
make up about 40 percent. They are more sloping than
Torriorthents and are on toe slopes and fans.
Included with these soils in mapping are areas of Flu-
vents, flooded, that make up 5 percent of this map unit.
Torriorthents are deep and well drained. They have
little or no profile development. The surface layer ranges
from sandy loam to clay loam and is very stony. The
underlying layers are sandy loam, loam, or clay loam and
have cobbles, stones, and boulders. Content of rock
fragments in the profile exceeds 35 percent.
Permeability of the Torriorthents is rapid to moderately
slow. Available water capacity is moderate to low. Roots
penetrate to a depth of 60 inches or more. Surface
runoff is moderate. The stony surface layer helps to
prevent erosion. Some areas are subject to rare flooding.
Haplargids are deep and well drained. These soils are
highly variable, and profile development is weak to mod-
erate. In some areas a thin, dark colored surface layer is
forming. The surface layer most commonly is loam or
sandy loam and is very stony. The subsoil is loam, clay
loam, or light clay and has cobbles and stones. Content
of rock fragments exceeds 35 percent.
Permeability of Haplargids is moderate to moderately
slow. Available water capacity is moderate to low. Root-
ing depth is 60 inches or more. Surface runoff is
medium. The stony surface layer helps to prevent ero-
sion. Some areas are subject to rare flooding.
Because of surface stoniness and slope, these soils
are unsuited to crops. Seedbed preparation and drilling
of seed for pasture plantings on depleted native range or
in cleared areas are generally not practical because of
surface stoniness. A limited degree of success can be
expected by broadcasting seed late in summer or early
in fall. Siberian wheatgrass, western wheatgrass, Indian
ricegrass, and crested wheatgrass are adapted species.
Good pasture management must be practiced to protect
the soils from erosion and to provide grazing for live-
stock.
These soils provide habitat for desert cottontail,
mourning dove, and chukar. Water developments can be
used to improve wildlife habitat.
Ii these soils are used for urban development, the
main limitations are stoniness and overflow. -i hese limita-
tions can be overcome by the use of proper design and
construction methods.
This complex is in capability subclass Vlls, nonirrigat-
ed.