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Influences of the duration of periodic sway on the stem form development of four-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Creator:: Carlton, Ronald Roy
Abstract:: Stem form development of trees in response to wind has been established in the literature to be a response to stem sway induced by the wind. The response is manifested in modifications to height and diameter growth which strengthen the stem against wind stresses. Experiments in the literature show that...
Resource Type:: Masters Thesis
Full Text:: : Influences of the Duration of Periodic Sway on the Stem Form Development of Four-year-old Douglas-fir

Effects of vegetation control, stock size, fertilization, and soil moisture on the shoot and root development of Douglas-fir seedlings

Creator:: Burney, Owen T.
Abstract:: The overall purpose of this study was to examine the root and shoot development of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings at two distinct time periods in seedling establishment (after I and 3 growing seasons) in response to fertilizer, stock size, vegetation control, and soil moisture treatments. Two separate experiments...
Resource Type:: Masters Thesis
Full Text:: Development of Douglas-Fir Seedlings Abstract approved: - Signature redacted for privacy. {7 Robert W

Healing time for pruned douglas-fir

Creator:: Anderson, Eric A. and Forest Products Laboratory (U.S.)
Abstract:: Original report dated 1951. Information reviewed and reaffirmed 1958.
Resource Type:: Technical Report
Full Text:: HEALING TIME FOR PRUNED DOUGLAS-FIR September 1951 INFORMATION

An interpretation of annual rings of Douglas fir

Creator:: Bennett, Stanley M.
Resource Type:: Undergraduate Thesis
Full Text:: An interpretation of annual rings of Douglas fir All

Growth growing-stock relationships in young Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Creator:: Sales Luis, Jaime Fernando
Abstract:: In the thinning theory, the hypothesis that the stand growth is unaffected by the density over a broad range of densities is generally accepted today. In this study three different measures of stand density were used in basal area growth and volume growth multiple regressions in even-aged managed stands, searching...
Resource Type:: Masters Thesis

Effects of seed characters and competitive environment on two-year performance of open-pollinated Douglas-fir families

Creator:: St. Clair, John Bradley
Abstract:: Ungerminated seed and recent germinants from 39 open-pollinated Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) families were planted in each of three competitive environments in order to determine the degree to which growth differences among families are influenced by competitive environment, seed weight, and date of emergence. The three competitive...
Resource Type:: Dissertation

The control of bud development in Douglas-fir seedlings by photoperiod, flurprimidol, and endogenous gibberellins and abscisic acid

Creator:: Graham, Jeff S.
Abstract:: The objective of this thesis was to evaluate the hypothesis that bud development of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings is controlled by endogenous gibberellins or abscisic acid and that cultural treatments affect bud development by altering levels of these growth regulators. To test this hypothesis, three experiments were conducted...
Resource Type:: Dissertation

Thermoperiods and soil temperatures as they affect growth and dormancy of Douglas-fir seedlings of different geographic origin

Creator:: Lavender, Denis P., Overton, W. Scott, and Oregon State University. Forest Research Laboratory
Abstract:: The effects of a range of thermoperiods and soil temperatures upon growth of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings were studied. The seeds, of varieties glauca and menziesii, came from eight widely separated areas. Plants from both varieties made maximum growth with soil and air temperatures between 18 and 24...
Resource Type:: Technical Report
Full Text:: 7P 2S-.I- F'. -3 ?fir roc seciod a'cd sore 7em ia.t as

Effects of grazing management and tree planting pattern in a young Douglas-fir argoforest

Creator:: Carlson, Deirdre H.
Abstract:: A silvopastoral system using a Douglas-fir (Pseudotsuga menziesii) tree crop and subclover (Trifolium subterraneum) as a nitrogen-fixing forage crop was investigated near Corvallis, Oregon, during 1983-1985. Treatments included all possible combinations of three planting patterns (no trees, trees planted 2.5 m apart in a grid, and clusters of five trees...
Resource Type:: Masters Thesis
Full Text:: a young Douglas-fir argoforest AN ABSTRACT OF THE THESIS OF Deirdre H. Carlson for the degree of

Fifth-year growth responses of Douglas-fir to crowding and other competition

Creator:: Cole, Elizabeth C.
Abstract:: This thesis examines the competitive aspects of Douglas-fir trees growing with two commonly associated competitors--red alder and grass--at varying densities. Two Nelder plots in three different environments in the Oregon Coast Range were studied. The sites represented the warm, dry climate of the Willamette Valley; the warm, moist climate of...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Influences of the duration of periodic sway on the stem form development of four-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Effects of vegetation control, stock size, fertilization, and soil moisture on the shoot and root development of Douglas-fir seedlings

Healing time for pruned douglas-fir

An interpretation of annual rings of Douglas fir

Growth growing-stock relationships in young Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Effects of seed characters and competitive environment on two-year performance of open-pollinated Douglas-fir families

The control of bud development in Douglas-fir seedlings by photoperiod, flurprimidol, and endogenous gibberellins and abscisic acid

Thermoperiods and soil temperatures as they affect growth and dormancy of Douglas-fir seedlings of different geographic origin

Effects of grazing management and tree planting pattern in a young Douglas-fir argoforest

Fifth-year growth responses of Douglas-fir to crowding and other competition

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