Initial and continued effects of a release spray in a coastal Oregon Douglas-fir plantation
U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1996 - Technology & Engineering - 11 pages
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abnormal boles age 4 averaged age 9 alder Alnus rubra alder per acre Alnus rubra Bong Analysis of variance boles and branching Corvallis Cubic feet/acre Department of Agriculture DF RA WH+SS Douglas-fir per acre Douglas-fir Pseudotsuga menziesii Douglas-fir resulting Forestry Sciences Laboratory full spray treatment growth all species Herbicide reduced number herbicide treatment herbicide-treated plots inch and larger increased number lb per acre menziesii Mirb natural regeneration Northwest Research Station number and size number of volunteer Obermeyer Oregon Coast Ranges Pacific Northwest Research percent more volume Picea sitchensis plantation age plots were thinned precommercial thinning probably received full probably were sprayed received full release red alder Alnus release at age release group release spray silvicultural Sitka spruce Siuslaw National Forest six plots probably Slickrock statistically significant thinned plots three groups treatment means tree numbers trees 1.6 inches Tsuga heterophylla U.S. Department volume growth volunteer conifers Waldport Ranger District western hemlock