Gross cubic foot volume equations are now available for pinyon-juniper and several other woodland species in Nevada, Idaho, Utah, Colorado, Wyoming, and South Dakota. The volume equations are based on data collected as a subsample of woodland inventories conducted by Federal and State land management agencies. In these inventories, volumes of 4,705 trees were estimated by a visual sampling method.
United States Department of Agriculture, Forest Service, "Pinyon-Juniper Volume Equations for the Central Rocky Mountain States" (1985). Forestry. Paper 46.