Download or read book Effects of Fertilization on the Growth and Foliar Nutrition of Immature Douglas fir in the Interior Cedar hemlock Zone of British Columbia written by Robert Peter Brockley and published by University of British Columbia Press. This book was released on 2006 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The effects of fertilization with nitrogen (N) alone, and in combination with sulphur (S), on the growth and foliar nutrition of six immature, managed Douglas-fir (Pseudotsuga menziesii var. glauca [Beissn.] Franco) stands in the Interior Cedar-Hemlock (ICH) biogeoclimatic zone of British Columbia are reported 6 years after treatment. Results indicate that interior Douglas-fir stands growing on circummesic sites within the ICH zone are generally responsive to fertilization. Disregarding results from one installation that was damaged by Armillaria root disease, average net volume response following fertilization with N alone was 13.5 m3/ha (range: 6.5-24 m3/ha) compared to the control treatment. Six-year volume gains from N+S additions averaged 16 m3/ha (range: 10-23 m3/ha). In relative terms, stand volume responses to fertilization with N and N+S averaged 24% (range: 8-41%) and 28% (range: 16-39%), respectively. Growth projections generated by the tipsy growth and yield program indicate that the accelerated stand development following a single fertilizer application will likely reduce biological rotations (i.e., culmination of mean annual increment) and technical rotations (e.g., minimum harvestable age) by 2-3 years. Relative growth responses compare favourably with results from Douglas-fir fertilization studies in other jurisdictions.‍?‍?Pre- and post-fertilization foliar nutrient analyses indicate that several of the sites were marginally S deficient, and that S status deteriorated 1 year following N fertilization. Added S was readily taken up, thereby maintaining a favourable N:S balance in trees fertilized with N+S. Despite improvements in foliar S status, the incremental growth benefits of added S may be too small on most sites to justify the extra expense involved in blending and applying N+S fertilizers in large-scale aerial operations.‍?‍?Results from this study, and others, indicate that pre-fertilization levels of foliar N and sulphate S (SO4) may have utility in selecting candidate stands and in making appropriate fertilizer prescriptions. For example, the largest growth responses following fertilization may be expected in stands with pre-fertilization foliar N levels less than 11.5 g/kg ( 13 g/kg when using dry combustion analytical methods). Also, low foliar N combined with small amounts of pre-fertilization foliar SO4 (

Download or read book Effects of Repeated Fertilization on Forest Floor and Mineral Soil Properties in Young Lodgepole Pine and Spruce Forests in Central British Columbia written by Robert Peter Brockley and published by University of British Columbia Press. This book was released on 2009 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental Project (EP) 886.13 Maximizing the Productivity of Lodgepole Pine and Spruce in the Interior of British Columbia was implemented by the B.C. Ministry of Forests Research Branch in 1992 to examine the potential to dramatically improve the productivity of interior forests by permanently alleviating nutritional growth constraints. Nine area-based field installations (six pine and three spruce) were established on representative sites within three biogeoclimatic zones between 1992 and 1999. The growth and yield objectives of the "maximum productivity" study are to compare the effects of different regimes and frequencies of repeated fertilization on forest growth and development and to determine optimum fertilization regimes for maximizing stand volume production. In addition, several companion studies have been undertaken at selected sites to determine the long-term effects of large nutrient additions on above- and belowground timber and non-timber forest resources. The purpose of this report is to examine the 12-year effects of repeated fertilization on forest floor and mineral soil properties at two study sites (one pine and one spruce) in central British Columbia.--Document.

Download or read book A Systematic Review of Forest Fertilization Research in Interior British Columbia written by Anya Reid and published by . This book was released on 2017 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the large body of published and unpublished research that sup- ports the FFT Program, uncertainty remains about the extent of the biologi- cal response of tree growth to fertilization by different tree species under different ecosystem, site, and stand conditions. [...] To determine the state of knowledge and where further research and data analysis are needed, we con- ducted a systematic review of literature on the growth responses of interior tree species to fertilization. [...] Relative growth response of interior spruce to fertilization ranged from 9 to 109% for height, from 75 to 277% for volume, and from 27 to 203% for basal area (Table 1). [...] Two other topics of concern with respect to the resilience of British Colum- bia forests to climate change are the interactions between forest fertilization 15 Basal area (%) Volume (%) Height (%) and (1) damage due to insects, disease, and weather, and (2) carbon fluxes and storage. [...] Effects of nitrogen source and season of application on the nu- trition and growth of lodgepole pine.

Download or read book Canadian Journal of Forest Research written by and published by . This book was released on 2014 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influences of Fertilizers on Cone Production and Growth of Young Douglas Fir Western Hemlock and Western Red Cedar on the U B C Research Forest written by J. Harry G. Smith and published by . This book was released on 1968 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Extension Note written by and published by . This book was released on 2008 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fertilization and Thinning Effects on a Douglas fir Eccosystem at Shawnigan Lake written by Eleanor R. G. McWilliams and published by . This book was released on 1997 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Operational Fertilization on Foliar Nutrient Content and Growth of Young Douglas fir and Pacific Silver Fir written by P. H. Cochran and published by . This book was released on 1986 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forest Fertilization written by Henry Nixon Chappell and published by . This book was released on 1992 with total page 316 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 Fertilization and Thinning Effects on a Douglas fir Ecosystem at Shawnigan Lake written by Stephen A. Y. Omule and published by . This book was released on 2011 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of the Shawnigan Lake Project (SLP), which was initiated in 1970, is to study the mechanisms of response to thinning and fertilization. The SLP study is composed of two components: a) the main experiment, and b) subsidiary studies. The main experiment, established in 1971--1972 (36 plots), investigated the effects of thinning and fertilization, and consisted of three levels of thinning and five levels of fertilization, including controls. This report focuses on the main experiment and the 32-year growth response for selected stand attributes. Report sections cover the experiment's study area and experimental design; database description; analysis methods outline; study results; and conclusions based on the experiment and results.--Includes text from document.

Download or read book Fertilization and Thinning Effects on a Douglas Fir Ecosystem at Shawnigan Lake written by Guillaume Thérien and published by Canadian Forest Service. This book was released on 1996-01-01 with total page 44 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 Fertilizing Douglas fir Forests written by Richard E. Miller and published by . This book was released on 1979 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Book Publishing Record written by and published by . This book was released on 2005 with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Fertilizer Pellets on the Growth of Douglas fir written by J. Walters and published by . This book was released on 1966 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Net Basal Area Response 9 Years After Fertilizing Thinned and Unthinned Douglas fir written by British Columbia. Ministry of Forests and published by . This book was released on 1990 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: