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Agrostis ~-a lust-ri~s or A ro ron elongatum, then other similar genera <br />were rated wit~Fin the respective category. An example would be rating <br />A r~ostis (species) as moderately sensitive or A rg~yron intermedium as <br />mo erately tolerant. None of the grasslike plants or- s ru s encountered in <br />the area studied were rated for salt tolerance in the article of Maas and <br />Hoffman, <br />The specific region of the Foidel Creek alluvial valley floor which was <br />sampled is located approximately 2200 feet from the confluence of Middle and <br />Foidel Creeks, and is noted as Pasture 19 on Map 1. The area covers 10.1 <br />acres. Data from five transects were collected. The species and their <br />respective cover and composition is reported on Table 1. The total <br />vegetative cover is 85.6%. Of that amount, grasses comprise 40.4%, grasslike <br />plants, such as Carex and Juncus, cover 12.0%, forbs are 27.4%, and <br />shrubs cover 5.8°k--Ttegarding ~t tolerance, 5.8% of the grasses are <br />considered moderately tolerant (slender wheatgrass and mountain brome) and an <br />additional 7.6% are of similar genera are considered moderately tolerant <br />(intermediate wheatgrass, western wheatgrass, foxtail barley). Thus, a <br />total of 13.4% of the species can be considered moderately tolerant. Timothy <br />is described as moderately sensitive and covers 3.0% of the area. Bentgrass, <br />1.6°6, is of similar genera which is considered to be moderately sensitive. <br />Thus, a total of about 4.6% of the plant species can be considered moderately <br />sensitive. <br />The area which was sampled for the Middle Creek alluvial valley floor is <br />shown on Map 1 as the irrigated pastures 7, 2, and 8S. The native vegetation <br />in region 18 was included in the summary analysis. A total of 36 transects <br />were conducted. The individual species cover and their composition is <br />reported on Table 2, Middle Creek Alluvial Valley Floor. The total <br />vegetative cover is 76.7%, Grasses comprise 53.3%, grasslike plants cover <br />9.2%, forbs cover 13.3%, and shrubs cover .9%. Of the grasses, slender <br />wheatgrass, mountain brome, smooth brome and tall fescue are considered <br />moderately tolerant. Similar species of other tolerant grasses include <br />intermediate wheatgrass, western wheatgrass, wheatgrass, Idaho fescue, and <br />foxtail barley. Using the weighted averages as calculated for the study <br />area, shown on table 5, the moderately tolerant species cover 26.8% of the <br />area. Moderately sensitive grass species (orchard grass and timothy) are <br />found in the Middle Creek region. Bentgrass and white Dutch clover <br />(Trifolium repens), which are considered to be moderately sensitive, are <br />also found. On a weighted average, a total of 14.5% of the Middle Creek <br />sample area is composed of moderately sensitive species. <br />The Trout Creek alluvial va]ley floor region was evaluated with the <br />assessment of irrigated pastures 7, 8, 10, 11, 12E, 14, 15N, and 15S which <br />are denoted on Map 1. Pasture 12W was also sampled; this pasture has been <br />irrigated in the past, but is not currently used for hay production. The <br />area is more typical of a sagebrush/meadow type community. Data from a total <br />of 36 transects was collected in this area. Table 3, Trout Creek Alluvial <br />Valley Floor, shows the individual species' cover and composition. In this <br />region, total vegetative cover is 80.6%. The grasses cover 50.8%, grasslike <br />plants cover 6.2%, forbs comprise 22.4%, and shrubs cover 1.2% of the area. <br />Smooth brome and reed canarygrass are both considered moderately tolerant. <br />Similar moderately tolerant species include tall fescue (Festuca <br />arundinaceae), foxtail barley, intermediate wheatgrass, western wheatgrass, <br />and wheatgrass. A total of 16.1% of the area is composed of moderately <br />tolerant species, as calculated on a weighted average. Orchard grass and <br />2 <br />