Download or read book The Impact of Ozone Water Stress and Acid Rain on the Growth and Physiology of Fraser Fir Seedlings written by Elizabeth Chang-Hsu Tseng and published by . This book was released on 1987 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the US FRG Research Symposium written by and published by . This book was released on 1989 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Terrestrial Effects Task Group V Peer Review written by and published by . This book was released on 1987 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface Level Ozone Exposures and Their Effects on Vegetation written by Allen S. Lefohn and published by CRC Press. This book was released on 1991-12-18 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tropospheric ozone is a regionally distributed air pollutant that adversely affects both humans and vegetation. Surface-Level Ozone Exposures and Their Effects on Vegetation focuses on the formation, distribution, and transport of surface-level ozone; the characterization of its exposures; the mechanisms and processes involved in its deposition and uptake by plants; and its effects on the growth of crops and forest trees. State-of-the-art information is presented and the methodology for studying its effects on vegetation is critically reviewed. This background material leads to a discussion of the approaches for developing an air quality standard that will provide protection from the adverse effects of ozone, as well as suggestions for future research directions. Researchers and professionals in the utility industry, oil industry, and government environmental agencies; university instructors; and students will find that this book is filled with information that can be used on a daily basis in their work and studies.
Download or read book An Investigation of the Effects of Simulated Acid Rain and Elevated Ozone on the Physiology of Ponderosa Pine Pinus Ponderosa Dougl Ex Laws Seedlings and Mature Trees written by Bahram Momen and published by . This book was released on 1993 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Forest Research written by and published by . This book was released on 1992 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of the Role of Ozone Acid Deposition and Other Airborne Pollutants in the Forests of Eastern North America written by J. H. B. Garner and published by . This book was released on 1989 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report and Findings Update written by National Acid Precipitation Assessment Program (U.S.). Office of the Director and published by . This book was released on 1990 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Project Status Reports written by Forest Response Program (U.S.). Meeting and published by . This book was released on 1988 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Water Stress on Phenology Physiology and Morphology of Containerized Douglas fir Psuedotsuga Menziesii mirb Franco Seedlings written by Shafiqur Rehman Khan and published by . This book was released on 1992 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approximately 3-4 month-old containerized Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings (seed zone 262 and 271) were subjected to 6 moisture stress treatments (65, 53, 41, 29, 17 and 7% soil water content by volume of dry soil) starting July 4 to September 22, 1991 at Forest Research Laboratory's greenhouse at Oregon State University, Corvallis, OR. Seedlings were tested for various phenological, physiological, and morphological parameters. All the parameters were significantly affected by water stress treatments. Moderate soil water content resulted in increased and earlier terminal bud initiation and budset in seedlings whereas, too much and too little water content caused decreased and delayed bud initiation, budset, and bud development. The driest and wettest treatments apparently stressed these seedlings so severely and kept them growing respectively that they took longer to set bud. A small percentage of seedlings (13.1% of total 480 seedlings), after they had initiated bud formation, resumed their growth with increasing soil water content. Decreasing soil water content resulted in reduced total needle and root nutrient concentration and content (N, P, K, Ca, and Mg) except N concentration which was significantly higher at the lowest soil water content (7%). On the other hand, shoot nutrient concentration and content, measured at day 0 and 43, remained unaffected. Moisture stress treatments had also a profound effect on starch reserves in needles and roots. A significant decrease was found in starch concentration in roots (measured at day 0, 43, and 81) and in needles and roots (measured at day 81) with decreasing soil water content. Further analysis of needle:root starch concentration ratios showed a higher concentration in needles than that of roots, indicating that less starch was translocated from needles to roots due to severe moisture stress. Seedlings treated with the lowest soil water content were most stressed and experienced the greatest plant moisture stress (22.34 and 23.95 bars pre-dawn and mid-day PMS, respectively). There was an approximately 398 and 211% increase in pre-dawn and mid-day PMS respectively from the wettest to driest treatments. Similarly, water stress treatments had the greatest effect on various morphological attributes. Shoot height, caliper, fresh and dry weights of shoots and roots (measured at day 0, 43, and 81), total shoot height and caliper, shoot and caliper growth, and total fresh and dry weights of needles, stems, branches and roots (measured at day 81) decreased significantly with decreasing soil water content. Most drastic effect was found at the driest treatment (7% soil water content), where, seedlings decreased approximately by 66, 44, 25, 25, and 69% in shoot height and caliper growth, total fresh weight of needles, stems and roots from the wettest to driest treatments. This effect was also prominent in terminal bud development. Both terminal bud length and diameter were reduced approximately by 35 and 29% at the lowest soil water content. Severe moisture stress resulted in complete cessation of growth and breakdown of metabolic system of a few seedlings, thus, causing their mortality.
Download or read book Annual Report to the President and the Congress of the United States written by United States. Interagency Task Force on Acid Precipitation and published by . This book was released on 1988 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Forest Response Program written by Gerard D. Hertel and published by . This book was released on 1991 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forestry Theses Accepted by Colleges and Universities in the United States written by and published by . This book was released on 1981 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report National Acid Precipitation Assessment Program written by National Acid Precipitation Assessment Program (U.S.). Office of the Director of Research and published by . This book was released on 1986 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forestry Theses Accepted by Colleges and Universities in the United States July 1981 June 1990 written by and published by . This book was released on 1994 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acid Rain Abstracts Annual 1990 written by and published by . This book was released on 1991-04 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Annual Meeting written by Air Pollution Control Association. Annual Meeting and published by . This book was released on 1987 with total page 1282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
