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• TD12 • Tucker. At Tucker, the plains vegetation should dominate the Kutch-Louviers soil and the foothills vegetation the Bresser-Truckton. Little difference could be found, however. Past land abuses thinned the vegetation and accele- rated erosion, especially of the Kutch soil. Contour Terracing to control runoff, and other measures, have permitted a substantial recovery. There are still thin places where soil movement continues, Figure TD7, but they are balanced by places where the vegetation is good, Figure TDB. Overall, the range cover rates fair. Despite past land abuses, the composition of the vegetation at Tucker is surprisingly good. It contains remarkably few weeds, of the seven most abundant species, six are grasses and sedges, Table TD1. Yucca is the only non-forage plant rated abundant, Figure TD8. The list of species identified includes two good browse plants, winter fat and four-wing saltbush; and 17 species of grasses and sedges among the total of 56, Table TD2. The mining at Tucker has either excavated or buried about 20 acres of predominantly Kutch-Louviers soil. Under average weather conditions, with the range in its present fair condition, that represents an annual loss of about 10 cow months of grazing. The remaining hundred acres in the lease represent about 80 cow months. The examination for unique, rare or endangered plant species cannot be considered complete (see page J16). There is nothing unique about the environ- ment at Tucker, however. Plant species found here should he widespread, even if not abundant. The piles of overburden at Tucker have never revegetated well, even after 12 years, Figure TDg. The material on the surface of the piles must represent a poor seedbed. Dawson. Plains vegetation dominates the Nunn soil at Dawson, Foothills vege- tation dominates the ridges. The lower slopes and values betaaeen the ridges have mixed vegetations.