Friday, July 19, 2019
juniper :: essays research papers
Western Juniper’s Growing Influence in Eastern Oregon Estimated Acreage          1936          1988      > 10 percent cover     420,000          2.2 million      Total area with juniper               6 million Volume of current stand     --------     467 million cubic feet Private landowners own 58 percent of the area and 49 percent of the volume BLM is the principle owner of public lands with juniper – 79 percent of publicly owned juniper forest Over  ½ of the present juniper forest became established between 1850 and 1900 (greatest increase came between (1879 and 1918).      Rate of Establishment           1650 – 1800          2900 acres/year           1800 – 1850          8200 acres/year           1850 – 1900          23,100 acres/year           1900 – 1940           6000 acres/year 52 percent of juniper grows in the 10 – 15 inch precipitation zone 41 percent of juniper grows between 4000 – 5000 ft. in elevation Juniper crown intercepts more that  ½ of the annual precipitation Juniper transpires water year round compared to seasonal transpiration of other vegetation Juniper roots can extend several times the crown diameter Almost 50 percent of juniper forests have crown covers 10-20 percent Juniper woodlands have up to 10 times the erosion rate of sagebrush – grass ecotypes (Buckhouse et. al.) Average cubic volume of wood per acre in juniper forests is 200 cubic feet Over half the area of juniper forests have fewer than 50 trees per acre Counties with more that  ½ million acres of juniper           Crook           857,000               Harney          884,000           Grant          539,000               Jefferson     582,000 Information from: Gedney, D.R. et.al. (1999). Western Juniper in Eastern Oregon. USDA Forest Service. Pacific Northwest Research Station. General Technical Report, PNW-GTR-464, November 1999. Buckhouse, J. et al. (1982). Potential Sediment Production within Vegetative Communities in Oregon’s Blue Mountains. Journal of Soil and Water Conservation. Vol. 37, Number 2. Pgs. 120 – 122. Tim Deboodt OSU Crook County Extension Agent Prineville, OR The Drying of Oregon Potential water use of Western Juniper within current juniper area 500,000 acre feet to 920,000 acre feet per year      This is the equivalent of a river flowing year round at 680 to 1000 cfs per day
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