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 Effects of Fertilization at the Time of Planting on Field Performance of 1 1 Douglas fir Pseudotsuga Menziesii Mirb Franco Seedlings written by Patricio Javier Alzugaray Oswald and published by . This book was released on 2002 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: To study the combined effects of seedling quality and fertilization at the time of planting, three experiments were established in western Oregon during the winter of 2000. The first experiment investigated the effect of preplanting rootvolume and fertilization rate on the field performance of 1+1 Douglas-fir seedlings during two growing seasons. Results from this experiment showed that preplanting root volume is a good predictor of field performance. Seedlings with larger preplanting root volume survived and grew more than seedlings with smaller preplanting root volume. Fertilization at the time of planting slightly reduced survival, stimulated shoot and diameter growth during the first growing season, and reduced all parameters during the second growing season. The second experiment examined the effects of fertilizer placement in combination with fertilization rate on the performance of 1+1 Douglas-fir seedlings during two growing seasons. Results of this experiment showed a significant interaction for seedling survival between fertilizer placement and fertilization rate. Seedlings fertilized on the roots at the highest rate had the lowest survival (50%), while survival of all other treatments was above 70%. Fertilizer placement and fertilization rate did not affect seedling growth during the first growing season. However, during the second growing season, seedlings fertilized on the surface and those dibbled fertilized grew the most in height and diameter. Fertilization rate reduced seedling height growth but did not affect stem diameter growth. A third experiment monitored nutrient release patterns of similar controlled release fertilizers with different fertilizer release rates applied on the field over a 14-month period. Fertilizers with shorter release periods released more fertilizer by weight than fertilizers with longer release periods. However, none of the fertilizers studied released their nutrients in the time specified by the manufacturer. It is suggested that low soil temperatures and low soil moisture may have delayed the release periods of the fertilizers.
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 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Large Stock and Fertilizer Improve Growth of Douglas fir Planted on Unstable Granitic Soil in Northern California written by R. O. Strothmann and published by . This book was released on 1980 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use of large stock and fertilizer resulted in significant increases in seedling height growth, but not in better survival.
Download or read book National Proceedings written by and published by . This book was released on 2003 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings RMRS written by and published by . This book was released on 1998 with total page 190 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 . This book was released on 1984 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Proceedings Forest and Conservation Nursery Associations written by and published by . This book was released on 2003 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1998 contains proceedings for: Southern Forest Nursery Association Conference; Northeastern Forest Nursery Association Conference; and the combined Forest Nursery Association of British Columbia/Western Forest and Conservation Nursery Association meeting.
Download or read book The Effects of Nursery Fertilization on the Growth of Douglas fir written by Harry William Anderson and published by . This book was released on 1962 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Science and stewardship to protect and sustain wilderness values written by and published by . This book was released on 2003 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report SRS written by and published by . This book was released on 1995 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report RM written by and published by . This book was released on 1985 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tree Planters Notes written by and published by . This book was released on 2011 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some no. include reports compiled from information furnished by State Foresters (and others).
Download or read book Planters Notes written by and published by . This book was released on 1994 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some no. include reports compiled from information furnished by State Foresters (and others).
Download or read book Conifer Cold Hardiness written by F.J. Bigras and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 593 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conifer Cold Hardiness provides an up-to-date synthesis by leading scientists in the study of the major physiological and environmental factors regulating cold hardiness of conifer tree species. This state-of-the-art reference comprehensively explains current understanding of conifer cold hardiness ranging from the gene to the globe and from the highly applied to the very basic. Topics addressed encompass cold hardiness from the perspectives of ecology, ecophysiology, acclimation and deacclimation, seedling production and reforestation, the impacts of biotic and abiotic factors, and methods for studying and analyzing cold hardiness. The content is relevant to geneticists, ecologists, stress physiologists, environmental and global change scientists, pathologists, advanced nursery and silvicultural practitioners, and graduate students involved in plant biology, plant physiology, horticulture and forestry with an interest in cold hardiness.
Download or read book Proceedings of the North American Containerized Forest Tree Seedling Symposium Denver Colorado August 26 29 1974 written by Richard W. Tinus and published by [Lincoln,s Neob.] : Great Plains Agricultural Council. This book was released on 1974 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
