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(`' ~.. H4-DF (2) • along roads and other areas where vegetation has been removed. Tree har- vesting may be restricted during periods of high snow accumulation, snow melt or high rainfall. Reforestation must be carefully managed to reduce competition from undesirable understory plants. Plant competition delays natural regeneration but does not prevent the eventual development of a fully stocked, normal stand of trees. Planting nursery stock will speed up reforestation. ?.mong the trees that are suitable for planting are Douglas fir, Englemann spruce and Lodgepole pine. Proper design of road drainage systems and care in [he placement of culverts help to control ero- sion. Spoil from excavations is subject to rill and gully erosion and to sloughing. Roads and landings can be protected from erosion by constructing diversions and by seeding cuts and fills. • The native vegetation on this unit is mainly White fir, Douglas fir, and Engelmann spruce. Other important plants that characterize this unit are aspen, Arizona fescue, elk sedge, spike triscetum, mountain I~rumc, wild rose, bluegrass, Oregon grape, ferns, snowberry, buffalo berry, wild celery, and strawberry. Logged areas and many forested areas are used For grazing. Proper grazing use in conjunction with a planned grazing system are important prac- tic es to insure desired quality and quantity of native vegetation. Grazing should be delayed until the sail is firm and the more desirable forage plants have achieved sufficient growth to withstand grazing pressure. Deferred grazing speeds up revegetation and improves areas in poor condition. Stock eaater development and fencing can improve the distribution of livestock and the production of understory plants.