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Creator:: Abee, Albert
Abstract:: To investigate the movement of elements (N, P, k, Ca, and Mg) from the tree crowns by natural litterfall and leave wash, plots were established on six 450 year-old growth stands at the H. J. Andrews Experimental Forest. The following are the results of the data analyses. Elemental concentrations contained...
Resource Type:: Masters Thesis
Full Text:: January 4, 1973. Title: IJutrient Cycling Under 450-Year-old Dougl~s-fir Stands. Abstract app roved e

Creator:: Bell, Thomas Evans
Abstract:: A rapid and efficient procedure that required no partitioning was developed for the purification of abscisic acid (AbA) from the needles of Douglas-fir seedlings. Extracted needle pigments were removed by a PVP column and the eluted AbA was concentrated on a DEAE column. The AbA was eluted from the DEAE...
Resource Type:: Masters Thesis

Creator:: Heiner, Terry Charles, 1941-
Abstract:: Several hundred two year old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings were planted in an enclosure designed to permit control of soil moisture. The seedlings came from five seed sources in southern Oregon and one seed source in northwestern Oregon. Mortality terminal and lateral budburst, and soil moisture were recorded...
Resource Type:: Masters Thesis

Creator:: Graff, Joseph Edward
Abstract:: In study 111, four Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stocktypes (1-0, 2-0 standard nursery run and low density bareroot seedlings, and 1 year old container stock) were outplanted in a randomized incomplete block design to an old field in the Willamette Valley of Oregon in a factorial experiment t4 stocktypes...
Resource Type:: Masters Thesis

Creator:: Wolff, Scott
Abstract:: One of the largest problems facing the forester in the Pacific Northwest today is the economical, rapid rehabilitation of cut-over lands. Many of these cut-over lands are planted to Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco]. Previously, both aerial and spot seeding techniques have been evaluated for their efficiency in Douglas-fir regeneration....
Resource Type:: Masters Thesis

Creator:: Tucker, Richard Edward
Abstract:: Two seed sources of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings were grown under several environments in controlled growth chambers and in a natural environment. All seedlings were grown for six months and then harvested. One purpose of this study was to observe environmental influences on the anatomy of the needle....
Resource Type:: Masters Thesis

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