Index Catalog // ScholarsArchive@OSU

Maturation of noble fir (Abies procera) and grand fir (Abies grandis) seed

Creator:: Snyder, Jeffrey L.
Abstract:: The objectives of this investigation were two-fold: (1) to examine possible seed and cone characteristics and their usefulness as seed maturity indices, and (2) to examine the effects of artificial ripening on seed maturation and germination. Cone fresh weight, cone length, cone specific gravity, cone color, seed fresh weight, seed...
Resource Type:: Masters Thesis

Spot seeding Douglas-fir in the Pacific Northwest using a Finnish shelter seeding method

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

The physiology of dormancy of western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings

Creator:: Nelson, Eric Alan
Abstract:: The physiology of dormancy of western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings was examined. Many areas proved to exhibit similarities to those elucidated for Douglas-fir, although significant differences were also found and necessitate the use of caution in extrapolating data from one species to the other.. Dormancy of western hemlock...
Resource Type:: Dissertation

The relationship of abscisic acid concentration in Douglas-fir needles to seedling vigor

Creator:: Puttonen, Pasi Kalevi
Abstract:: A quantitative and predictive measure of seedling vigor during the regeneration chain would be of utmost help for forest regeneration work. This was the impetus to study the possibility of using abscisic acid (ABA) concentration of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) needles as an indicative measure of seedling vigor prior...
Resource Type:: Masters Thesis

Water relations and associated morphology of conditioned Douglas-fir and jack pine seedlings subjected to periods of drought stress

Creator:: McClain, K. M.
Abstract:: Significant post planting mortality of young conifer seedlings often occurs on drought prone sites because seedlings fail to either establish, or maintain favourable water relations. Survival is contingent upon growth which occurs when turgor pressure is above a threshold level. Since growth after planting is influenced by nursery cultural practices,...
Resource Type:: Dissertation

Physiological and biochemical studies of stratified Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] seeds after redrying, storage, and subsequent germination

Creator:: Malavasi, Marlene de Matos
Abstract:: The physiological and biochemical responses of Douglas-fir seeds to stratification, redrying, storage and subsequent germination were determined. Stratification increased seed vigor, embryo and gametophyte phosphorylative efficiency and RNA synthetic ability. Redrying seems to increase the rate of enthryonic nucleic acid synthesis, speed of germination and seedling vigor. ATP, total adenosine...
Resource Type:: Dissertation

Responses of Douglas-fir seedlings to various nursery handling and outplanting practices

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

Factors affecting nitrogen nutrition of western hemlock

Creator:: Gill, Ranjit Singh
Abstract:: Preliminary fertilization trials with western hemlock have yielded responses which vary significantly from stand to stand, especially in areas near the Pacific Coast. Growth responses have varied from positive to negative in an erratic manner. Previous data did not permit validation of such hypotheses as, "the application of fertilizer to...
Resource Type:: Dissertation

Water relations, growth and survival of root-wrenched Douglas-fir seedlings

Creator:: Duryea, Mary L.
Abstract:: Chapter 1 Growth and Survival of Root-Wrenched Douglas-fir Seedlings Root wrenching of seedlings (severing the roots 15 cm below the soil surface) was investigated as a nursery practice to improve growth and survival of field-planted Douglas-fir from six local seed sources in the Pacific Northwest. At lifting, shoots of wrenched...
Resource Type:: Dissertation

A procedure for the purification and quantitation of abscisic acid : and its application to a study of abscisic acid concentrations in needles of cold stored Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings

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

ScholarsArchive@OSU

Maturation of noble fir (Abies procera) and grand fir (Abies grandis) seed

Spot seeding Douglas-fir in the Pacific Northwest using a Finnish shelter seeding method

The physiology of dormancy of western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings

The relationship of abscisic acid concentration in Douglas-fir needles to seedling vigor

Water relations and associated morphology of conditioned Douglas-fir and jack pine seedlings subjected to periods of drought stress

Physiological and biochemical studies of stratified Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] seeds after redrying, storage, and subsequent germination

Responses of Douglas-fir seedlings to various nursery handling and outplanting practices

Factors affecting nitrogen nutrition of western hemlock

Water relations, growth and survival of root-wrenched Douglas-fir seedlings

A procedure for the purification and quantitation of abscisic acid : and its application to a study of abscisic acid concentrations in needles of cold stored Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings

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