Download or read book Nutrition of Sitka Spruce on Upland Sites in Northern Britain written by Stephen A. Smith and published by . This book was released on 2002 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nutrition of Sitka Spruce on Upland Restock Sites in Northern Britain written by Stephen Alistair Smith and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predicting the Productivity of Sitka Spruce on Upland Sites in Northern Britain written by R. Worrell and published by Bernan Press(PA). This book was released on 1987 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Nutrition of Sitka Spruce on Upland Restock Sites written by C. M. A. Taylor and published by . This book was released on 1990 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Whole tree Planting on Early Growth of Sitka Spruce on an Upland Restocking Site written by J. C. Dutch and published by . This book was released on 1995 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Whole tree Harvesting on Early Growth of Sitka Spruce on an Upland Restocking Site written by Janet Dutch and published by . This book was released on 1995 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Deficiency in Sitka Spruce Plantations written by C. M. A. Taylor and published by . This book was released on 1990 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: On moorland and heathland soils in Great Britain, nitrogen deficiency can severely restrict the growth of certain conifer species, including Sitka spruce, the main commercial species.
Download or read book Geographical Variation in Sitka Spruce Productivity and Its Dependence on Environmental Factors written by Richard V. Worrell and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to investigate altitudinal and geographical variation in the productivity of Sitka spruce in upland Scotland, to relate this to environmental variables and to use the information to develop a basis for predicting Sitka spruce yield form site factors. A total of 188 0.04 ha temporary sample plots were established in 15 to 50 year old Sitka spruce stands at 37 sites in Scotland and northern England, mostly spanning the upper 200m elevation range of plantations. At each plot estimates of General Yield Class (GYC) were made and the following site factors were assessed; elevation, geomorphic shelter (topex), aspect, slope, soil type and rooting depth. In addition, estimates of wind-climate, mean summer temperature (June-September), mean annual accumulated temperature > 5.6°C and annual rainfall were made by extrapolation of forestry Commission "tatter flag" records and Meteorological Office data. GYC declined by about 3.2 - 4.0 m3 ha -1 yr -1 per 100 m increase in elevation due to the effects of increasingly adverse climatic and edaphic conditions, GYC was fairly closely correlated with elevation at the individual sites, but there was considerable site to site variation. GYC values at specific elevations were higher in inland and southern areas than in coastal and northern ones. The geographical pattern of the relationship between GYC and elevation was strikingly similar to the distributions of growing season temperatures and wind-climate. Correlation and multiple regression analysis demonstrated that GYC was well correlated with extrapolated values of accumulated temperature and tatter rate, these two variables accounting for up to 78 per cent of the variation in GYC in the best multiple regression models. GYC also proved to be correlated with aspect, topex, soil type and crop age. Productivity was highest on north and east-facing aspects and increased with greater levels of geomorphic shelter. Differences in soil type only accounted for a small amount of variation in GYC (2-3 per cent). GYC was significantly negatively correlated with crop age, probably as a result of improved standards of silvicultural treatment. The best multiple regression models accounted for 78-86 per cent of the variation in GYC and were associated with confidence limits of ±2.2 - 2.6 m3 ha -1 yr -1. The mean figure for predicting GYC for a single site (acquisition) was calculated to be ± m3 ha -1 yr -1, and this figure was confirmed by results of a validation survey. The information presented could easily be adapted for predicting productivity and assessing suitable upper planting limits in practical forestry.
Download or read book Sustainable Forestry written by Keith M. Reynolds and published by CABI. This book was released on 2007-01-01 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the current state-of-the-art within each of the four major themes: science and policy; inventory and monitoring; statistics and modelling; and information and knowledge management, in the context of sustainable forestry. It fosters dialogue across thematic areas concerning both strategic and operational approaches to integrate research on sustainable forestry. It also enhances and encourages international collaboration towards sustainable forestry practice worldwide.
Download or read book Sustainable Forestry Management and Wood Production in a Global Economy written by Robert L Deal and published by CRC Press. This book was released on 2007-07-05 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: A global view of responsible forestry management Sustainable Forestry Management and Wood Production in a Global Economy examines emerging issues and key strategies for sustaining wood production while maintaining other forest resources. Internationally recognized forestry experts explore a broad range of topics on sustainable forestry at t
Download or read book Super Sitka for the 90s written by Great Britain. Forestry Commission and published by . This book was released on 1992 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over 50 per cent of current planting of upland forest in the UK is Sitka spruce. Major areas of research on this species has sought to increase growth rates and timber yields, mainly through making genetically improved planting stock available to the forest grower. This publication is comprised of edited presentations made at a meeting in Elgin in 1990. Each paper addresses a separate issue relevant to the development of one of the most important species in upland forestry at the present time.
Download or read book Forestry Commission Bulletin written by and published by . This book was released on 1969 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cultivation of Soils for Forestry written by David B. Paterson and published by . This book was released on 1999 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Irish Forestry written by and published by . This book was released on 1991 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Research Annual Report and Accounts written by and published by . This book was released on 2002 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report and Accounts written by Great Britain. Forest Research and published by . This book was released on 2002 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Choice of Seed Origins for the Main Forest Species in Britain written by R. Lines and published by . This book was released on 1987 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
