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• <br /> <br /> <br />exposure is indicative of the variability due primarily to differences <br />in exposure. The presence of scattered clumps of Gambel Oak <br />interspersed with openings dominated by grasses is indicative of the <br />variability due primarily to differences in soil depth. <br />Ttie Soil C:oiiservation Service lists the spxies for the Rocky <br />• <br />• <br />Foothills range site which are decreasers, increasers, and invaders in <br />tl~e x•ange site descriptions. 't'hese lists plus the maximum allowable <br />peroent composition by weight for the increasers follow: <br />DixR1;ASL~S <br />Indian ricegrass <br />Needle and thread <br />June grass <br />Native bunch bluegrass <br />Bearded wheatgrass <br />Sideoats gramna <br />Fountain muhly <br />Arizona fescue <br />Little bluestem <br />Globemallow <br />Indian paintbrush <br />American vetch <br />Bi ttect~rush <br />Mountain mahogany <br />Four-Wing Saltbush <br />Ninterfat <br />Cliffrose <br />hfornnn Tea <br /> h1A}~IMUM <br />INCREASES ALLOWABLE INVADERS <br /> <br />Western wheatgrass 20 All introduced plants <br />Galleta 10 <br />Blue grama 5 All annuals <br />Squirreltail 5 Sleepy grass <br />Sand dmpseed 5 Oregon grape <br />Sedges 5 GurmveuYl <br />Lupine, loco ) <br />Penstemon ) <br />Yax•row ) -- 15i~ with <br />Herbaceous Sage) lirnt of 5~ <br />Aster ) fox• any one <br />B~kwheat ) species <br />Other perennial (orbs T <br />Pinon and Juniper 15 <br />Big Sagebrush. 5 <br />Rabbitbrush 5 <br />Gambel Oak ) <br />Snowberry ) <br />Serviceberry ) -- 10 <br />Fender Bush ) <br />Squawapple ) <br />IY•inged Sage 5 <br />Snakeweed T <br />Pinque T <br />Y~ca T <br />Cactus T <br />hlininum required for excellent -- 40% <br />The estimated total herbage yield of this site is 500 to 1000 pounds per <br />acre (air dry). <br />- 5 - <br />