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Stratification Period And Germination Of Douglas Fir Seed From Oregon Seed Orchards
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Book Synopsis Stratification Period and Germination of Douglas-fir Seed from Oregon Seed Orchards: Two Case Studies by : Frank C. Sorensen
Download or read book Stratification Period and Germination of Douglas-fir Seed from Oregon Seed Orchards: Two Case Studies written by Frank C. Sorensen and published by . This book was released on 1991 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stratification Period and Germination of Douglas-fir Seed from Oregon Seed Orchards by : Frank C. Sorensen
Download or read book Stratification Period and Germination of Douglas-fir Seed from Oregon Seed Orchards written by Frank C. Sorensen and published by . This book was released on 1991 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stratification Period and Germination of Douglas-Fir Seed From Oregon Seed Orchards by : Frank C. Sorensen
Download or read book Stratification Period and Germination of Douglas-Fir Seed From Oregon Seed Orchards written by Frank C. Sorensen and published by Forgotten Books. This book was released on 2018-01-10 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Stratification Period and Germination of Douglas-Fir Seed From Oregon Seed Orchards: Two Case Studies Some Pacific Northwest seed plants and nurseries already stratify Douglas-fir seeds up to 13 weeks, so the recommendations are within the range of current practices. Because substrate temperature is such an important factor, spring sowing in most outdoor nurseries probably should include stratifying for at least 8 weeks to meet the above recommendations. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Book Synopsis Effect of Field Stratification on Douglas Fir Seed Germination by : Denis P. Lavender
Download or read book Effect of Field Stratification on Douglas Fir Seed Germination written by Denis P. Lavender and published by . This book was released on 1958 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Date of Cone Collection and Stratification Period on Germination and Growth of Douglas-fir Seeds and Seedlings by : Frank C. Sorensen
Download or read book Effect of Date of Cone Collection and Stratification Period on Germination and Growth of Douglas-fir Seeds and Seedlings written by Frank C. Sorensen and published by . This book was released on 1980 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Date of Cone Collection and Stratification Period on Germination and Growth of Douglas-Fir Seeds and Seedlings (Classic Reprint) by : Frank C. Sorensen
Download or read book Effect of Date of Cone Collection and Stratification Period on Germination and Growth of Douglas-Fir Seeds and Seedlings (Classic Reprint) written by Frank C. Sorensen and published by Forgotten Books. This book was released on 2018-03-18 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Effect of Date of Cone Collection and Stratification Period on Germination and Growth of Douglas-Fir Seeds and Seedlings Mean rate of germination for each dish was determined by plotting cumulative percentage against days1 on probit paper (campbell and Sorensen, in A straight line was visually fitted to the points and mean germination rate, R, read as days1 at which observed germination equaled 50 percent of total germination. Germination rates for each stratification period and seed maturity were based on the average rate of all five families. Families were not replicated within treatments, and no test was made of family differences. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Book Synopsis Influence of Date of Cone Collection on Douglas-fir Seed Processing and Germination by : Donald L. Olson
Download or read book Influence of Date of Cone Collection on Douglas-fir Seed Processing and Germination written by Donald L. Olson and published by . This book was released on 1975 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physiological and Biochemical Studies of Stratified Douglas-fir [Pseudotsuga Menziesii (Mirb.) Franco] Seeds After Redrying, Storage, and Subsequent Germination by : Marlene de Matos Malavasi
Download or read book Physiological and Biochemical Studies of Stratified Douglas-fir [Pseudotsuga Menziesii (Mirb.) Franco] Seeds After Redrying, Storage, and Subsequent Germination written by Marlene de Matos Malavasi and published by . This book was released on 1983 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 phosphates and energy charge levels of stratified seed were stable through air drying. RNA levels were markedly reduced during 1 and 3 months of cold storage possibly indicating an enhanced RNAse activity. Storage also reduced seed energy status, seed viability, and seed vigor. The loss of stratification benefits and subsequent deterioration throughout storage were similar in stratified and redried stratified seeds. None of the biochemical criteria studied in the 5-day-old seedling showed close proportionality with either physiological responses or biochemical changes obtained in the seed stage. Studies of water distribution among seed structures indicate that different tissues hydrate from an average of 6% to varied extent after stratification. Stratified seeds contained 46, 56, 52 and 32% moisture content in whole seed, seed coat, embryo and gametophyte, respectively. Moisture reduction of stratified seeds to 35% did not affect embryo or gametophyte moisture content. However, redrying stratified seeds to 25% reduced the moisture content of all seed structures. Three months of storage did not alter moisture distribution within seeds. Results suggest that it would be advantageous to redry seeds to a range of 25 to 35% before sowing to produce vigorous seedlings or to allow the expression of best benefits of stratification.
Download or read book Research Note PNW written by and published by . This book was released on 1988 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Light Quality and Periodicity Upon Germination of Douglas-fir Seed (Pseudotsuga Menziesii (Mirb.) Franco) and on Growth of Douglas-fir Seedlings by : Le Roy Curtis Johnson
Download or read book Effect of Light Quality and Periodicity Upon Germination of Douglas-fir Seed (Pseudotsuga Menziesii (Mirb.) Franco) and on Growth of Douglas-fir Seedlings written by Le Roy Curtis Johnson and published by . This book was released on 1965 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study on the effects of light quality and periodicity on the germination of Douglas-fir seed and the growth of Douglas-fir seedlings was conducted. Interest was focused on responses that could be measured and observed without biochemical assay. It was found that .Douglas-fir seed, s would respond to red-light treatments by germinating and that this stimulating effect of red light could be reversed with far-red light. The phytochrome enzyme system is therefore undoubtedly present. The stimulating effects of red light on germination are influenced by the periodicity of the red-light treatment and temperature. Dry Douglas-fir seeds pre-treated with red light have significantly higher germination when compared to seed receiving no red light pretreatment, provided the seeds are germinated in absolute darkness but not if the seeds are allowed to germinate under "standard" conditions or when sown in the soil. Red light given during the dark period will maintain active growth in Douglas-fir seedlings, and far-red light will cause seedlings to go dormant. Red light is effective in breaking dormancy. as opposed to far-red light. Dormancy can be broken with far-red light breaks provided the dormant seedlings do not receive far-red light pre-treatment and/or provided the dormancy period is sufficiently long prior to the far-red light treatment for the seedlings to have a "dormant rest period". Blue light is also effective in breaking dormancy but red light is the most effective. When actively growing seedlings are irradiated with red and farred light for fifteen minutes in the middle of the dark period, red light has a strong influence on maintaining growth and far-red light has a slight influence on maintaining growth. Excessive amounts of far-red light will cause resumption of growth.
Book Synopsis Douglas Fir Seed Germination After Exposure to Varying Temperatures and Humidities by : Denis P. Lavender
Download or read book Douglas Fir Seed Germination After Exposure to Varying Temperatures and Humidities written by Denis P. Lavender and published by . This book was released on 1954 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stratification Requirements for Germination of Western Larch (Larix Occidentalis Nutt.) Seed by : Frank C. Sorensen
Download or read book Stratification Requirements for Germination of Western Larch (Larix Occidentalis Nutt.) Seed written by Frank C. Sorensen and published by . This book was released on 1990 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Woody Plant Seed Manual by : United States. Forest Service
Download or read book The Woody Plant Seed Manual written by United States. Forest Service and published by Forest Service. This book was released on 2008 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stratified Douglas Fir Seed Sown in April, May and June by : Jack Frederick Gartz
Download or read book Stratified Douglas Fir Seed Sown in April, May and June written by Jack Frederick Gartz and published by . This book was released on 1955 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Woody Plant Seed Manual, Agriculture Handbook 727, July 2008 by :
Download or read book The Woody Plant Seed Manual, Agriculture Handbook 727, July 2008 written by and published by . This book was released on 2009 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis General Technical Report PNW-GTR by :
Download or read book General Technical Report PNW-GTR written by and published by . This book was released on 2007 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dormancy and Barriers to Germination by : Pacific Forestry Centre
Download or read book Dormancy and Barriers to Germination written by Pacific Forestry Centre and published by . This book was released on 1993 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the symposium, covering dormancy and barriers to germination in rowan, loblolly pine, Pacific silver fir, Douglas- fir, Sitka spruce, western redcedar, yellow-cedar, sugar pine, and Scots pine. General topics cover a seed conditioning concept in Sweden, respiration, strategies for hardwood species, temperature effects, and artificial ripening.
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