Ecological adaptions in Douglas-fir populations
U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1982 - Nature
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3-year height 50 populations analysts binomial distribution Bitterroot Bitterroot Mountains Bud burst Bud burst Bud set Campbell Clark Fork drainages climate cold hardiness Continental Divide Department of Agriculture Deviation from regression differences among populations Douglas-fir populations Douglas-fir Pseudotsuga menziesii eastern zone ecological genetics five-dimensional application flushed twice Forest and Range Forest Service Freezing injury function genetic differentiation genetic variation geographic and ecologic glauca graphed hypotheses graphically habitat types hardiness of populations high growth potential hypothesis development independent variables interaction intercorrelated Intermountain Forest lesser hardiness level of probability maritime climate multiple regression nursery Ogden patterns of first-year patterns of variation percent Pfister phenology populations from northern populations from western proportion of seedlings Range Experiment Station regression models related to elevation replicates residual variance Rocky Mountain Douglas-fir Sampling error seed source seedlings that flushed set buds set Two flushes shadehouse sigmoidal third growing season traits U.S. Department Utah zero