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• of the local hydrologic and pedologic environments. Also included in this category <br />are chaparral, a dense mixture of broadleaf evergreen schlerophyll shrubs, and the <br />occurrences of mountain mahogany (Cercocarpus ledifolius) and scrub oaks (Quercus). <br />The eastern brushlands are typically former croplands or pasture lands (cleared <br />from original forest land) which now have grown up in brush in transition back to <br />forest land to the extent that they are no longer identifiable as cropland or pasture <br />from remote sensor imagery. Mony of these brushlands ore grazed in on extensive <br />manner by livestock and provide wildlife habitat. These areas usually remain os part <br />of the farm enterprise, even though not being used at their former levels of <br />intensity. Eastern brushland areas traditionally have not been included in the <br />rangeland concept because of their original forested state prior to clearing for <br />cropland or pasture and generally have been summarized statistically with pasture- <br />land. Because they function now primarily as extensive grazing land, they are <br />included here as part of the Rangeland category. After sufficient forest growth has <br />occurred, they should be classified as either Deciduous, Evergreen, or Mixed Forest <br />Land. Those occurrences of shrubs and brush which are part of the Tundra are not <br />included under Rangeland. <br />• 33. Mixed Rangeland <br />When more than one-third intermixture of either herbaceous or shrub and brush <br />rangeland species occurs in a specific area, it is classified as Mixed Rangeland. <br />Where the intermixed land use or uses total less than one-third of the specific area, <br />the category appropriate to the dominant type of Rangeland is applied. Mixtures of <br />herbaceous and shrub or brush tundra plants are not considered Rangeland. <br />4. FOREST LAND <br />Forest Lands have a tree-crown areal density (crown closure percentage) of 10 <br />percent or more, are stocked with trees capable of producing timber or other wood <br />products, and exert an influence on the climate or water regime. Forest Land <br />generally can be identified rather easily on high-altitude imagery, although the <br />boundary between it and other categories of land may be diffic~~lt to delineate <br />precisely. <br />Lands from which trees have been removed to less Than 10 percent crown closure <br />• but which hove not been developed for other uses also are included. For example, <br />2.°-9 <br />