2012-10-01_REVISION - M1979094HR ‎(15)‎

• Permit No: M1979094HR
• IBM Index Class Name: REVISION
• Doc Date: 10/1/2012
• Doc Name: AM-01 APPLICATION
• From: COTTER
• To: DRMS
• Type & Sequence: AM1
• Email Name: DMC
• Media Type: D
• Archive: No

Common Name
Scientific Name
% Total Cover
Indian ricegrass
Oryzopsis hymenoides
20
New Mexico needlegrass
25
Blue grama
Bouteloua gracilis
5
Squireltail
Sitanion hystrix
5
Galleta
Hilaria jamesii
5
Other grasses
6
Prickly pear
Opuntia species
2
Fleabae
Erigeron species
2
Other forbs
6
Winterfat
Eurotia lanata
2
Big sagebrush
Artemisia tridentata
15
Fourwing saltbush
Atriplex cahescehs
2
Other shrubs
5
Annual dry matter production of understory vegetation is about 400 -500 pounds per acre.
This understory provides sparse cover, less than 50% and sometimes less than 25 %.
Interspersed in this woodland are occasional sagebrush parks, generally a quarter acre
each. The sagebrush, Artemesia tridentate var. wyomingensis, is an indicator of deeper
soil, and these parks occur usually on slopes gentler than the surrounding woodland.
Other species found in these parks include Indian ricegrass, blue grama, rabbitbrush,
fourwing saltbrush, and various other species given in Table J.2 -1. A number of small
stands of Indian ricegrass were noted which were very vigorous and virtually exclusive of
other species. This grass is well adapted to the area and should be an important
reclamation species. In the fall of 1978, the sagebrush, saltbush, and rabbit brush,
produced abundant seed crops, which indicates the potential for locally available seed
sources.
J.3 "Semi -desert loam"
The second plant association occurring on the JD -7 site has been designated as a "semi -
desert loam" range site. Species distribution by percent of total cover for this site is
given in Table J.3 -1.
Table J. 3 -1
Common Name Grassland/ Shrub Community Cover, Percent of Total Cover
Average annual forage production on this range is about 700 pounds per acre. Increased
production has been possibly by seeding introduced species, notably crested wheatgrass,
and by careful grazing management. However, some pastures near the JD -7 site had once
been seeded and consequently neglected and /or overgrazed. These areas contain
scattered clumps of crested wheatgrass, interspersed among the remaining areas which
have been almost completely overgrown with cheatgrass. A few reinvading shrubs are
confined to soils along eroded drainages.
J -2