Download or read book Nursery Fertilization of Douglas Fir Seedlings with Different Forms of Nitrogen Classic Reprint written by M. A. Radwan and published by Forgotten Books. This book was released on 2017-11-19 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Nursery Fertilization of Douglas-Fir Seedlings With Different Forms of Nitrogen Presently, the nurseries follow different fertilization regimes Which vary basically in the amount and form of nitrogen. Although amounts of nitro gen fertilizer applied are logically based upon the fertility of the nursery soil, choice of the nitrogen source has been largely empirical. 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.

Download or read book Response of Douglas fir Seedlings to Nitrogen Sulfur and Phosphorus Fertilizers written by M. A. Radwan and published by . This book was released on 1985 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nursery Fertilization of Douglas fir Seedlings with Different Forms of Nitrogen written by and published by . This book was released on 1971 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nursery Fertilization of Douglas fir Seedlings with Different Forms of Nitrogen written by M.A. Radwan and published by . This book was released on 1971 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Response of Douglas Fir Seedlings to Nitrogen Sulfur and Phosphorus Fertilizers Classic Reprint written by M. A. Radwan and published by Forgotten Books. This book was released on 2018-09-08 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Response of Douglas-Fir Seedlings to Nitrogen, Sulfur, and Phosphorus Fertilizers This study, therefore, was designed to study effects of N, S, and P additions on growth and nutrient content of Douglas-fir seedlings grown in two forest soils in a lathhouse. We are aware of the limitations of pot tests in providing prescriptions that can be directly applied to field situations. However, the very limited information about Douglas-fir nutrition now available and the high cost of establishing field tests strongly justify preliminary experimentation with seedlings. 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.

Download or read book Foliar Mineral Content of Forest and Nursery grown Douglas fir Seedlings written by Kenneth William Krueger and published by . This book was released on 1967 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nursery Fertilization of Douglas fir Seedlings with Different Forms of Nitrogen written by M. A. Radwan and published by . This book was released on 1971 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wrenching Douglas Fir Seedlings in August written by William I. Stein and published by Forgotten Books. This book was released on 2018-01-08 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Wrenching Douglas-Fir Seedlings in August: Immediate but No Lasting Effects Keywords: Regeneration, wrenching, nursery practices, seedling growth, browsing -regeneration, Douglas-fir, Pseudotsuga menziesii. 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.

Download or read book Growth and Nutrient Allocation of Douglas fir Seedlings written by Kim Everett and published by . This book was released on 2005* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regeneration of Douglas-fir following harvesting has proven difficult on many sites in British Columbia. As a result, alternative nursery practices are being explored to improve seedling growth. Using two experiments I aimed to identify an improved nutritional program for Douglas-fir seedlings. The objective of the first experiment was to identify the optimum nitrogen (N) source ratio for Douglas-fir between two inorganic sources of N, ammonium (NH4+) and nitrate (NO3- ). Seedlings were grown in controlled environments in aeroponic culture with solutions containing 0:100, 20:80, 40:60, 60:40, 80:20 or 100:0 NH4+:NO3- ratios. Growth and nutrient allocation was observed for 45 days. Different NH4+ and NO3-ratios resulted in significant differences in growth and nutrient allocation. Seedlings grown in solutions containing abundant and relatively equal portions of NH4+ and NO3- were characterized by the greatest relative growth rates, greatest biomass and stable internal nitrogen concentrations. Seedlings grown in solutions containing high NH4+ (80:20 and 100:0 NHS+:NO3- ) concentrations were characterized by lower relative growth rates, less biomass, lower internal nutrient concentrations and lower rates of photosynthesis and root respiration compared to seedlings with less NH4+ (20:80, 40:60 and 60:40 NH4+:NO3- ). Seedlings appeared to take up a greater proportion of NH4+ than NO3- from solution. The objective of the second experiment was to examine the implications of two nursery fertilization regimes for growth and nutrient dynamics. Seedlings were grown in a nursery with nutrients added at a constant rate (conventional fertilization) or at an exponentially increasing rate of 2% day-1 (exponential nutrient loading). At the time of planting, half of the conventionally fertilized seedlings were planted with slow release fertilizer packets. Growth and nutrient allocation was observed for two years following planting. In the field experiment, although exponential nutrient loading applied 25% more N in the nursery compared to the conventional regime, no benefits in growth or nutrient allocation were found. Two years after planting, there were no significant differences in height, root collar diameter or total dry mass between seedlings grown under the different nursery fertilizer regimes. In contrast, seedlings planted with additional fertilizer consistently outperformed seedlings grown with exponential nutrient loading, with greater height, root collar diameter and dry mass. Two growing seasons after planting there were no significant differences among treatments in whole-plant N concentrations.

Download or read book Growth and Nutrient Allocation of Douglas fir Seedlings written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Regeneration of Douglas-fir following harvesting has proven difficult on many sites in British Columbia. As a result, alternative nursery practices are being explored to improve seedling growth. Using two experiments I aimed to identify an improved nutritional program for Douglas-fir seedlings. The objective of the first experiment was to identify the optimum nitrogen (N) source ratio for Douglas-fir between two inorganic sources of N, ammonium (NH4+) and nitrate (NO3- ). Seedlings were grown in controlled environments in aeroponic culture with solutions containing 0:100, 20:80, 40:60, 60:40, 80:20 or 100:0 NH4+:NO3- ratios. Growth and nutrient allocation was observed for 45 days. Different NH4+ and NO3-ratios resulted in significant differences in growth and nutrient allocation. Seedlings grown in solutions containing abundant and relatively equal portions of NH4+ and NO3- were characterized by the greatest relative growth rates, greatest biomass and stable internal nitrogen concentrations. Seedlings grown in solutions containing high NH4+ (80:20 and 100:0 NHS+:NO3- ) concentrations were characterized by lower relative growth rates, less biomass, lower internal nutrient concentrations and lower rates of photosynthesis and root respiration compared to seedlings with less NH4+ (20:80, 40:60 and 60:40 NH4+:NO3- ). Seedlings appeared to take up a greater proportion of NH4+ than NO3- from solution. The objective of the second experiment was to examine the implications of two nursery fertilization regimes for growth and nutrient dynamics. Seedlings were grown in a nursery with nutrients added at a constant rate (conventional fertilization) or at an exponentially increasing rate of 2% day-1 (exponential nutrient loading). At the time of planting, half of the conventionally fertilized seedlings were planted with slow release fertilizer packets. Growth and nutrient allocation was observed for two years following planting. In the field experiment, although exponential nutrient.

Download or read book Nursery Fertilization OfDouglas fir Seedlings with Different Forms of Nitrogen written by M. A. Radwan and published by . This book was released on 1971 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Responses of Container grown Douglas fir Seedlings to Varying Potassium and Nitrogen Fertilization Regimes written by Ralph W. Kingsbury and published by . This book was released on 1989 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Carbon and Nitrogen Allocation Patterns of 2 0 Douglas fir Seedlings Following Nitrogen Fertilization in the Autumn written by Hank A. Margolis and published by . This book was released on 1985 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Douglas-fir (Pseudotsuga menziesii Mirb. Franco) seedlings at a nursery in western Oregon were fertilized with nitrogen in October. Free amino acid (FAA) and total nitrogen concentrations in needles, stems and fine roots were followed from before fertilization until just prior to budbreak the following spring. Before budbreak in mid-March, the FAA and total nitrogen concentrations in the fertilized seedlings were significantly higher than the unfertilized seedlings. Fertilized seedlings showed significant depletion of non-structural carbohydrates (NSC) relative to the unfertilized seedlings. The reduction in carbohydrate reserves following fertilization probably reflects increased respiration associated with the synthesis and maintenance of higher levels of enzymes. The seedlings were lifted from the nursery bed and planted in a split plot design. The main treatment was the presence or lack of grass competition. Within each main plot, the previously fertilized and unfertilized seedlings were planted. Sucrose was applied to the soil around each seedling to limit the availability of nitrogen to tree roots. On the average, the fertilized seedlings broke bud ten days earlier than the unfertilized seedlings and produced more growth aboveground. The earlier budbreak was responsible for initial differences in growth response. Later harvests showed that fertilized seedlings also exhibited higher relative growth rates. Seedlings growing in the grass plots had predawn water potentials of -1.5 MPa by early August. By September 3, the unfertilized seedlings growing with grass showed significantly more predawn water stress than any of the other three treatments. Although the fertilized seedlings had higher FAA and total nitrogen concentrations than unfertilized seedlings when they were planted, by the end of one growing season the FAA arid total nitrogen concentrations had equalized. However, the fertilized seedlings contained more FAA and nitrogen because of their greater size. Grass competition affected both seedling nitrogen and non-structural carbohydrate chemistry. After one growing season, the fertilized seedlings showed a 3 cm increase in height increment; a 29% increase in the number of stem units on the terminal leader; a 44% increase in aboveground growth; a 25% increase in total seedling leaf area; a 23% increase in relative growth rate; and a 14% increase in production per unit nitrogen.

Download or read book The Influence of Fall Fertilization and Moisture Stress on the Growth and Field Performance of Container grown Douglas Fir Pseudotsuga Menziesii Mirb Franco Seedlings written by Thomas Jopson and published by . This book was released on 1984 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Nitrogen and Phosphorus Fertilization on Douglas fir Nursery Growth and Survival After Outplanting written by R. Van den Driessche and published by . This book was released on 1980 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fall Fertilization Effects on Douglas fir Seedling Quality written by Todd M. Birchler and published by . This book was released on 1997 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal Douglas-fir (Psuedotsuga menziesii (Mirb.) Franco) 1 + 1 seedlings were fertilized with two types of fertilizers (NB4NO3+K2SO4 and (NH. 4)2 SO4+KC1) at four rates (0, 80, 160, 320 kg N and K/ha) split over 3 application dates (September 19, October 13, November 1, 1996). By January 10, total Kjeldahl nitrogen (TKN) concentrations increased 16, 30, and 34% and contents increased 6, 20, and 26% for the 80, 160, and 320 kg N/ha treatments relative to the unfertilized seedlings. Potassium levels remained relatively unchanged as a result of the fertilization treatments. Chloride concentrations increased 57, 77, and 112% and contents increased 45, 71, and 92% for the 80, 160, 320 kg K/ha as KC1 relative to the unfertilized seedlings. There was an immediate pulse in nitrate levels following the first application of NH4NO3+K2 SO4, but this was of short duration. Levels of most other nutrients continued to increase between September 16 and January 10, but these increases were generally unrelated to the fertilizer treatments. Although TKN levels increased, nutrient ratios determined as a proportion of TKN decreased, but generally remained within balance. Needle dry weights also increased at this time, but the increase was not related to the treatments applied. There were no differences in root growth potential (as measured by total new root dry weiglht) among the treatments. Seedlings that received 160 and 320 kg N/ha broke bud three days earlier than the unfertilized seedlings. Seedling cold hardiness LT50 levels on October 23, November 13, and December 9 showed no consistent significant differences among the fertilizer treatments. By December 30 all treatments had attained similar LT50 levels ( -14°C). Adding high levels of fertilizers after budset in the fall did not appear to disrupt the cold hardiness process. Detectable differences in baseline seedling variable chlorophyll fluorescence Fvar/Fmax levels among the treatments occurred on November 13 and December 30. Fertilized seedlings had consistently higher Fvar/Fmax than unfertilized seedlings. Fall fertilization to stimulate late season luxury consumption of nitrogen appears to be beneficial if conducted after seedlings have ceased growth and set bud. If no biologically significant nutrient imbalances occur as a result of fertilization, as was the case in this study (up to 320 kg N/ha), seedlings with elevated levels of nitrogen may outperform seedlings with lower levels of nitrogen.

Download or read book Forest Nursery Pests written by and published by . This book was released on 1989 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: