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1 <br />E%HIBIT J (Cont'd) <br />' 9. Salsola-Artemisia Community - This very uncommon <br />community occurs on the one site where the Louviers <br />' clay soil covers a single area of appreciable size in <br /> the west c entral part of the permit area. The poor <br />' cond ition of the vegetation reflects the heavy clay <br /> soil that retards most growth. Cover is about 1590 and <br /> <br /> the height is about 6 inches. Productivity is negligible. <br />The area is probably heavily used by horses during the <br />winter as it offers some protection. <br />' 10. Existing Stockpiles - The existing stockpiles show a <br />distinct advancement in the successional sequence with <br />age. Older stockpiles are well stabilized primarily <br />with weedy species of Convolvulus, Aster, Yucca, <br />' Helianthus, blalva, Crested Wheatgrass, and Kochia. <br />It is distinctive and instructive that the sandy areas <br />1 favor deep rooted plants and have a low productivity. <br />Areas with more fines show a much greater growth and <br />' even in places reach a 1000 cover. Locally several <br />species are invading from the surrounding more or less <br />natural communities, and these include Linum lewissi <br />' and Stipa comata among others. By far the most inter- <br />esting feature of the old stockpiles is the invasion of <br />' Populus and Salix interior at the interface of a clay <br />layer and the sandy overburden. These species are <br />certainly not desirable for planting as they are not <br /> <br />- 37 - <br />1 <br /> <br />