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Cheatgrass brome, also known as "downy chess", "downy brome", "broncograss", "Mormon oats" and "Junegrass", is an annual grass that has become widely established on western ranges since its introduction from Europe. It presents complex problems which for years have complicated the management of the ranges it inhabits. In 1959 a cooperative research program on the management of cheatgrass ranges was started in southern Idaho by the Intermountain Forest and Range Experiment Station and the Bureau of Land Management. The beginning of these studies was necessarily preceded by a careful review and analysis of the literature on cheatgrass. This paper reviews that literature about this important western range plant. The...
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Soil under the crown of mesquite trees was compared to soil from adjacent openings at three depths for several physical and chemical properties near Tucson, Ariz. Bulk density was lower in soil under mesquite but increased with depth in that location. Organic matter, total nitrogen, total sulfur, and total soluble salts were up to three times greater in the surface 0 to 4.5 cm of mesquite soil than in open soil but declined with increasing depth to levels approximately the same as in open soil. Total potassium was higher under mesquite but increased with depth. Total phosphorus and hydrogen ion concentrations were the same in soil under mesquite as in soil from open areas. Results suggest that mesquite trees function...
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