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If the condition of the understory deteriorates, cheatgrass, <br />annual mustards, and pr~cklypear cactus increase. Where the <br />~,nderstory is in poor condition, these plants are dominant. Grazing <br />should be managed so that the desirable balance of species is <br />-~~aintained in the plant community. Removal of pinyon and ~un~per <br />increases the production of understory forage. Range seeding should <br />he done in conjunction with removal of the overstory. This would <br />improve the understory while providing firewood and posts. <br />These Pinon and Bowdish soils are capable of producing 9 to 15 <br />cords per acre in a stand which will average 5 inches in diameter at a <br />height of 1 foot. Young pinyon pine are desirable as Christmas trees. <br />The main limiting soil feature is the very high hazard of erosion. <br />Minimizing the risk of erosion is essential in harvesting timber. The <br />very low available water capacity of the soil and the limited rooting <br />depth can influence seedling survival. <br />The potential plant community on the Progresso soils ~s mainly <br />muttongrass, western wheatgrass, Indian ricegrass, and Wyoming big <br />sagebrush. The average annual production of air-dry vegetation is <br />about 1,100 pounds per acre. <br />If the condition of the range deteriorates, cheatgrass, broom <br />snakeweed, and scattered pinyon pine and Utah juniper increase. Where <br />the range is in poor condition, these plants are dominant. Grazing <br />should be managed so that the desirable balance of species is <br />maintained in tha plant community. <br />The management practices suitable for use on this unit are proper <br />grazing use and a planned grazing system. Brush management improves <br />deteriorated areas of range that are producing more woody shrubs than <br />were present in the potential plant community. <br />2~s <br />