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<br />~~ <br />:~Tt l ~ z> <br />(International rule) from an even-aged, fully stocked stand of trees <br />years old. Other trees suited to this unit are Engclmann spruce, Douglas <br />fir, and aspen. <br />The main concerns in producing and harvesting timber are reforestation <br />and prevention of water erosion along roads and other areas where vegetation <br />has been removed, and road construction on the steeper slopes. Tree har- <br />vesting may be restricted during periods of high snow accumulation, snow <br />melt or high rainfall. Reforestation must be carefully managed to reduce <br />competition from undesirable understory plants. Planting nursery stock <br />will speed up reforestation. Proper design of road drainage systems and <br />care in the placement of culverts help to control erosion. Spoil from <br />excavations is subject to rill and gully erosion and to sloughing. Roads <br />and landings can be protected from erosion by constructing diversions and <br />by seeding cuts and fills. <br />The potential plant community on this unit is mainly lJhitc fir, D~nil;las <br />fir, Ponderosa pine, Engelmann spruce, and aspen. Other important plants <br />that characterize this unit are Arizona fescue, mountain brome, bluegrass, <br />elk sedge, bearberry, Oregon grape, serviceberry, snowberry, and Gambel oak. <br />Grazing should be delayed until the soil is firm and the more desirable <br />forage plants have achieved sufficient growth to withstand grazing pressure. <br />Livestock grazing should be managed to protect [he soil from excessive <br />erosion. Steepness of slope limits access by livestock and promotes over- <br />grazing of less sloping areas. Stockwater development and fencing will <br />help get better livestock distribution and improve understory vegetation. <br /> <br />