Douglas-fir
Genetics (Douglas-fir)
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Apical Control of Stemwood Growth in Douglas-fir
Better understand apical control and carbon allocation in conifers.
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Apical Control of Stemwood Growth in Douglas-fir
Better understand apical control and carbon allocation in conifers.
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Field Root Architecture of Seedlings Grown with Varying Organic Amendments
This is a continuation of a study which began at the D.L. Phipps Nursery to examine root development of Douglas-fir seedlings transplanted in nursery beds with various organic amendments. This phase of the study will examine the subsequent root developme
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Chemical Thinning of Douglas-fir and Hardwood Control
Inject (hack and squirt) approximately 30 bigleaf maple, madrone, and small Douglas-fir (less than 6") with ARSENAL herbicide, GARLON 3A, 2,4-D. (Five to six trees treated during four times.)
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Seedling Growth Sudy
Seedling growth study. Transplanting 700 2-0 Douglas-fir, 700 2-1 grand fir, and 700 red alder wildings.
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Interplant Cascade birdsfoot trefoil & `Kalo' Dwarf English Trefoil with Douglas-fir
Interplant Cascade birdsfoot trefoil and `Kalo' Dwarf English Trefoil with recently planted Douglas-fir on 1/10 acre plots. Three replications. Measure growth response of Douglas-fir seedlings.
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The Use of Herbicides for Brush Control Prior to Regeneration Harvest of Douglas-fir
Aerial spray areas with herbicides and follow-up with a final harvest and planting of 2-0 Douglas-fir as in a normal operation.
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Compressive Loading of Second Growth Douglas-fir
The project's purpose is to determine the critical compressive loads which can be applied on intermediate support trees and tailtrees in a second-growth stand.
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Plant Moisture Stress Study
Survival and growth of Douglas-fir seedlings lifted under a range of PMS levels and planted under various environmental conditions.