Figure 18. Yields of blue grama and buffalograss (combined) as related to production of western ragweed on clay upland shortgrass range near Hays, 1958, range protected from livestock use for one season after 12 years of light grazing during the growing season (5 acres/yearling steer, May 1 to November 1, 1946 to 1956; and May 1 to October 1, 1956 to 1959). Curve derived by separating -on October 1, 1958- grass and forbs on areas yielding from 0 to 7,000 lb (dry weight) of western ragweed per acre.
In the example, 4,000 lb per acre of blue grama and buffalograss, along with 3,000 lb per acre of western ragweed, were produced in 1958. For that year, yields of grass were 4,000 lb or more per acre from range areas that produced 0 to 3,000 lb of western ragweed per acre, and were never less than 2,000 lb per acre from sites that produced 7,000 lb of ragweed per acre.
