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Filtering by: Subject Western hemlock -- Oregon -- Seedlings -- Evaluation

Xylem cavitation in newly planted western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings

Creator:

Kavanagh, Kathleen L., 1955-

Abstract:

Reforestation of Pacific Northwest forest-lands with western hemlock has been hindered by unexplained plantation failures. The purpose of this thesis is to provide information that will help in determining the cause of seedling damage and mortality. The studies focused on the relationship between xylem water potential, xylem cavitation and the...

Resource Type:

Dissertation
Ionic balance and the constituent organic acids of current-year foliage of western redcedar, western hemlock, and Douglas-fir seedlings

Creator:

Graff, Joseph Edward

Abstract:

Western redcedar, western hemlock, and Douglas-fir seedlings were transplanted into pots in one of two soils representative of high and low levels of available NO3 (and total N). The soils were collected from sites at Cascade Head (Oregon Coast) and Wind River (Washington Cascades). Whole plant and component relative dry...

Resource Type:

Dissertation
Animal damage, vegetative competition and growth of western hemlock seedlings in the Coast Range of Oregon

Creator:

Hyatt, Joan Marie

Abstract:

The growth of western hemlock during the first four years of seedling establishment was examined in a competitive environment in which seedlings were exposed to various types of animal damage and salmonberry and/or alder competition. The study utilized an existing Nelder/replacement series experiment which focused on the competitive effects among...

Resource Type:

Masters Thesis