Download or read book Effects of Fertilization and Density on Growth and Yield of Young Douglas fir Plantations in the Pacific Northwest written by Yuzhen Li and published by . This book was released on 2005 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiple Regression Inference of Yield for Douglas fir Plantations in the Pacific Northwest written by Nai Kuang Saetern and published by . This book was released on 2012 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiple regressions were formulated with predictor variables of latitude, longitude, and elevation, stand stocking, age, and site index for western Oregon, western Washington, and southwest British Columbia. Models were assessed for normality using plots of studentized residuals by fitted values, q-q plots, and fit was assessed by R2 value. Outliers were examined based upon Bonferroni p-values and Cook's distance. The developed seven multiple regression models were for response variables of cubic foot volume including top, cubic foot volume to top 4 and 6 inches in diameter, and Scribner board foot volume to top 4 and 6 inches in diameter. These models were used to examine the effects of early density controls and the effects of subsequent heavy first thinnings on volume yield. The assessment concluded that early density controls resulted in highest to lowest productivity in the order of 100 initial Trees Per Acre (TPA), 300 TPA, 500 TPA, and 700 TPA. In assessing effects from a first thin, the 300 TPA class was shown to have the most increased volume. The first thinning in the 500 and 700 TPA levels showed an overall minimal increase in volume and diameter size due to a longer delay in allocating growth from the crown to the stem. The models produced in this study can be of use in assessing and understanding predictions made by other regional growth models.

Download or read book Canadian Journal of Forest Research written by and published by . This book was released on 2009 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamic Growth and Yield Modeling with Climate written by Kevin Robert Gehringer and published by . This book was released on 2001 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Vegetation Control and Organic Matter Removal on Soil Water Content in a Young Douglas fir Plantation written by Warren D. Devine and published by . This book was released on 2006 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book General Technical Report PNW GTR written by and published by . This book was released on 2002 with total page 928 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Soil and Foliar Applications of Nitrogen Fertilizers on a 20 year old Douglas fir Stand written by Richard E. Miller and published by . This book was released on 1979 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Yield of Douglas Fir in the Pacific Northwest written by Richard Edwin McArdle and published by . This book was released on 1930 with total page 1282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Fertilization on Growth of Young Douglas fir Plantations Near Campbell River British Columbia written by E. H. Mallonee and published by . This book was released on 1974 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Volume Equations for Second growth Douglas fir written by David Bruce and published by . This book was released on 1974 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Soil Parent Material and Nitrogen Fertilization on Tree Growth and Wood Quality of Douglas fir in the Pacific Northwest written by Luyi Li and published by . This book was released on 2015 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of four soil parent material types (SPMs) and nitrogen fertilization treatment (224 kg N/ha) on Douglas-fir (Pseudotsuga menziesii (Mirb.) plantation growth and wood quality was studied on seven sites across western Washington and Oregon. Six aspects regarding wood quality were assessed and analyzed, (1) tree sonic acoustic velocity (TSAV), (2) log resonance acoustic velocity (LRAV), (3) dynamic modulus of elasticity (MOEd), (4) specific gravity (SG), (5) latewood percentage (LWP), and (6) rings per inch (RPI). Analysis of tree growth suggests the Mixed SPM type (Sedimentary and Igneous) is the most productive type in terms of timber volume increment. Fertilization has significantly enhanced Douglas-fir lateral growth and volume gain, but a variety of effects upon wood quality attributes were detected. In general, growth increment was negatively associated with quality observed in the breast height region. From the perspective of a whole tree, higher quality wood can be found in the segment from stump height to the live crown base. A strong correlation (R2 = 0.92) between TSAV and LRAV was observed, and TSAV was 8% higher than LRAV.

Download or read book The Effects of Previous Nitrogen Fertilization on Productivity and Soil Nitrogen and Carbon Pools of Subsequent Stands of Douglas fir Forests in the Pacific Northwest written by Paul W. Footen and published by . This book was released on 2011 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Miscellaneous Publication written by and published by . This book was released on 1983 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Forest Growth and Timber Quality Crown Models and Simulation Methods for Sustainable Forest Management written by Dennis P. Dykstra and published by DIANE Publishing. This book was released on 2010-10 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the relationships between forest management activities and timber quality. Sessions were organized to explore models and simulation methodologies that contribute to an understanding of tree development over time and the ways that management and harvesting activities can influence the quality of timber products recovered from those trees. Five keynote addresses, 29 plenary presentations, and 16 poster presentations covered the full breadth of forest growth and timber quality issues related to forest management. These proceedings comprise 19 papers based on presentations and posters, plus 28 abstracts for presentations. Also includes abstracts and slides from the presentations prepared by three keynote speakers. Illustrations.

Download or read book Effects of Thinning on Yield of Douglas fir written by Donald L. Reukema and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 28 (thesis year 1 983) a total of 10,661 theses titles from 26 Canadian and 197 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 28 reports theses submitted in-1983, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.