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Published online by Cambridge University Press: 12 June 2017
Big sagebrush (Artemisia tridentata, Nutt.) is such an aggressive increaser that most of the formerly grassy ranges of the inter-mountain and northwest regions have long since acquired a sagebrush aspect. A suggestion as to the impact of this change upon grazing capacity is apparent from a three-year study in northern Nevada. An average reduction in yield by 20 native and exotic grasses and weeds of about 70 per cent was shown under limited competition with big sagebrush (12).