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  1. Effects of herbaceous weed control on young Douglas-fir moisture stress and growth

    Profitable, even-aged forest management depends on the early establishment

  2. First-year response of Douglas-fir after release from snowbrush ceanothus

    The release of Douglas-fir from competition with snowbrush (Ceanothus velutinus Dougl.) has often been suggested as a way to improve conifer yield in the western Cascades. This study investigated this...

  3. The relationship of the survival of Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco, seedlings to certain soil and other...

  4. The effects of mycorrhizal colonization and phosphorus fertilization on Douglas-fir seedling growth, morphology, and...

  5. Effects of light preconditioning on the seasonal water relations of nursery-grown Douglas-fir

    Douglas-fir seedlings of a single seed source were grown in a nursery under three levels of light intensity: 9, 44, and 100 percent of full light. Growth over an entire growing season was monitored in terms of...

  6. Physiological control of fine root turnover in Douglas-fir

    To determine whether shading increases drought-induced

  7. Assessing the influence of silvicultural practices on Douglas-fir nutrition and stemwood production

    Nitrogen, phosphorus and sulfur concentrations were measured in the soil, foliage and litter of Douglas-fir growing in pure Douglas-fir and mixed conifer stands. On four sites of contrasting fertility and...

  8. Physiological and anatomical studies of several groups of Douglas-fir (pseudotsuga menziesii (Mirb.) Franco) seedlings which...

    Several hundred two year old Douglas-fir (Pseudotsuga

  9. Root biomass studies of old-growth Douglas-fir

    Root biomass studies were conducted in an old-growth stand of

  10. Factors affecting inter-tree root contact and the transmission of Phellinus weirii in young-growth Douglas-fir

    Groups of second-growth Douglas-fir (Mirb.) Franco were excavated

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