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n <br />LJ <br />However, as recently discussed in "Salinity Tolerance in Plants, Strategies <br />for Crop Improvement" (edited by Richard C. Staples and Gary H. Toenniessen, <br />1984), some genera of the families Cyperaceae and Juncaceae exhibit salt <br />tolerance. These grasslike plant families include the genera Carex and <br />Juncus. The particular species which were studied are not located in this <br />region, however, other species which grow in the area are likely to be salt <br />tolerant as well. Twentymile Coal Company has thus regarded species of Carex <br />and Juncus as moderately tolerant. <br />Table 3, Middle Creek Alluvial Valley Floor Vegetative Cover of Irrigated <br />Pastures, describes the vegetative cover and composition for Pastures 1 and 2 <br />on a weighted average basis. A total of 30 cover transects were conducted. <br />The total vegetative cover is 74.3%. Grasses comprise 61.6%, grasslike plants <br />cover 3.0%, and fortis cover 9.7%. Of the grasses, slender wheatgrass, smooth <br />brome, and tall fescue are considered moderately tolerant. Similar species of <br />other tolerant grasses include intermediate wheatgrass, western wheatgrass, <br />and Idaho fescue. The total cover of moderately tolerant grasses is 38.6%. <br />• The moderately tolerant sedges and rushes cover 3.0%. Using the weighted <br />averages as presented on Table 3, Middle Creek Alluvial Valley Floor <br />Vegetative Cover of Irrigated Pastures, the moderately tolerant species cover <br />41.6% of the irrigated area, or 56.0% of the relative composition. Moderately <br />sensitive grass species (orchard grass and timothy) are found in the Middle <br />Creek region. Redtop and clover (Trifolium), which are considered to be <br />moderately sensitive, are also found. On a weighted average, a total of 5.6% <br />of the middle Creek sample area is composed of moderately sensitive species, <br />which represents 7.6% of the relative composition. <br />Production data were collected for Pasture 2 of the Middle Creek region. As <br />shown on Table 1, Fish Creek Pasture Two Vegetative Cover and Production, an <br />/ I'' average of 46.6 grams per quarter meter square plot were obtained which <br />6Y I. corresponds to approximately 1,660 pounds per acre of oven dried forage. <br />Moderately tolerant plants compose 64.1% of that amount and 25.3% is of <br />moderately sensitive species. The vegetative cover of these two categories in <br />Pasture 2 is 44.9% for moderately tolerant and 4.20% for moderately <br />sensitive. The major component of moderately tolerant forage is smooth brome <br />I ~ <br />LJ <br />5 <br />Revised 10/1/86 <br />