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ERO Resources <br />respectively. Other grasses that do occur but are of less i~ortancH are <br />• sixweeks fescue - O.lk, needle-and-thread grass - 0.1X and Sandberg <br />bluegrass - <O.1X (Figure 4, Table 61. Annual forbs are important to this <br />type with a mean value of 0.4X, The only perennial forb present in <br />wheatgrass sites sampled was globemallow with a mean value of 0.6z. Past <br />disturbances can be typified by the presence of cheatgrass and annual <br />forbs in relatively large amounts ac is shown in this type. <br />Shrubs occurring in the western wheatgrass type have a mean cover of <br />4.4k. Important shrubs include big sagebrush with a mean cover value of <br />0.4X and Gordon saltbush with a mean cover value of 3.5X. Other shrubs <br />that occur in this type include fourxing saltbush, little rabbitbrush and <br />spiTry horsebrush. Half-shrubs that occur are petradoria with a mean cover <br />of O.SZ and snakeweed with a cover of O.lX (Figure 4, Table 6). These <br />shrubs do not form a true synusia but occur instead as scattered <br />individuals. <br />Density values for shrubs in descending order for this type are Gordon <br />• saltbush - 11,925/Ha, fourwing saltbush - 300/Ha, big sagebrush - 187/Ha, <br />spiny horsebrush 62/Ha and little rabbitbrush ]2/Ha. For the <br />half-shrubs petradoria and snakeweed, density values are 475/Ha and <br />250/Ha, respectively (Table 7). <br />Primary productivity in the western wheatgrass type is the second highest <br />sampled with a mean production of 52.6 grams per square meter. Grasses <br />important to this type with their corresponding means are western <br />wheatgrasa - 35.8 g/m2, cheatgrass - 12.0 g/m2, Sandberg bluegrass - <br /><0.1 g/m2, needle and-thread grass - 0.1 g/m2 and six weeks fescue - <br />0.2 g/m2. The above grasses account for 92X of the overall primary <br />productivity. Annual forbs including stickseed averaged 2.5 g/m2 <br />biomass. The only perennial forb of importance in this community type is <br />globemallow at an annual production rate of 1.6 g/m2. The half-shrub <br />snakeweed accounts for 0.3 g/m2 (Figure 5, Table 9). <br />• <br />II.F-41 <br />