Download or read book Long term recovery of bracken Pteridium aquilinum L Kuhn after asulam spraying written by R J. Pakeman and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper investigates the effects of a single asulam application, sprayed from the air, on the rhizome biomass, bud density, fronds and carbohydrate reserves of bracken (Pteridium aquilinum (L.) Kuhn) using a time sequence approach. Regression models were used to investigate how these characteristics varied with time after spraying, and were used, where appropriate, to calculate the time taken for full recovery after treatment. Frond density and biomass recovered in approximately eight years, bud numbers in seven, but rhizome biomass and total carbohydrate reserves required 10 to 12 years to recover. The consequences of these results are compared with predictions from a computer model and discussed in relation to the best timing of re-treatment and the management needed for long term control.
Download or read book Heaths and Moorland written by D. B. A. Thompson and published by Stationery Office Books (TSO). This book was released on 1995 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Western Europe has a wide range of heathers and moorland, with Great Britain and Ireland having optimum conditions for the full development of heather. Scotland has a mixture of blanket bogs, wet heathers and moorland scapes shaped by burning and other sorts of management mainly for red grouse, hill sheep and red deer. This text celebrates these landscapes - their history, habitats, wildlife and beauty. It also incorporates the ecologist Professor Charles H. Gimingham, to develop the study of heaths and moorland.
Download or read book Report of the Institute of Terrestrial Ecology written by and published by . This book was released on 1993 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weeds in a Changing World written by C. H. Stirton and published by Bcpc Publications. This book was released on 1995 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Botany written by and published by . This book was released on 2005 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Advances in Ecological Environmental Sciences written by and published by . This book was released on 1993-12 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Ecology Abstracts written by and published by . This book was released on 1979 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Agricultural Index written by and published by . This book was released on 1993 with total page 2728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vegetation Dynamics written by R. Knapp and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the International Botanical Congress in Edinburgh, 1964, Mrs. 1. M. WEISBACH-J UNK of The Hague discussed a plan for preparation by her publishing company (Dr. W. Junk b.v.) of an international Handbook of Vegetation Science. She proposed a series that should give a comprehensive survey of the varied directions within this science, and their achievements to date as well as their objectives for the future. The challenge of such an enterprise, and its evident value for the further development of vegetation research, induced the undersigned after some consideration to accept the offer of the honorable but also burdensome task of General Editor. The decision was encouraged by a well formulated and detailed outline for the Handbook worked out by the Dutch phytosociolo gists J. J. BARKMAN and V. WESTHOFF. A circle of scholars from numerous countries was invited by the Dr. Junk Publishing Com pany to The Hague in January 1966 to draw up a list of editors and contributors for the parts of the Handbook. The outline and list have served since for the organization of the Handbook, with no need for major change. The different burdens of editors and authors have compelled quite different timings for completion of the individual sections.
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1993 with total page 1688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 1997 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theses on any subject submitted by the academic libraries in the UK and Ireland.
Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1993 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sulfur Chemistry written by Xuefeng Jiang and published by Springer Nature. This book was released on 2019-08-28 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry Collections presents critical reviews from the journal Topics in Current Chemistry organized in topical volumes. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field.
Download or read book Principles of Medical Statistics written by Austin Bradford Hill and published by . This book was released on 1971 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Science of Allelopathy written by Alan R. Putnam and published by Wiley-Interscience. This book was released on 1986-10-16 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brings the reader up to date on the latest scientific findings regarding chemical interactions among all plants, whether higher or microbial plants. Contributors representing the world's authorities on the subject present allelopathic impacts in a variety of ecosystems throughout the world. Contains general information on the science and how allelopathy is proven, specific techniques to study allelochemicals, including their collection, identification and modes of action, examples of growth stimulation and autotoxicity, and new chemicals implicated in allelopathy and how some of these might be manipulated to human benefit. Includes extensive bibliography
Download or read book Diet Nutrition and Cancer written by Takamatsu no Miya Hi Gan Kenkyū Kikin. International Symposium and published by . This book was released on 1986 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Beneficial Insects written by David V. Alford and published by CRC Press. This book was released on 2019-04-23 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insects are key components of life on our planet, and their presence is essential for maintaining balanced terrestrial ecosystems. Without insects humans would struggle to survive, and on a world scale food production would be severely compromised. Many plants and animals depend directly or indirectly on insects for their very survival, and this is particularly so in the case of insectivorous birds and other such creatures. The beneficial role of insects is often overlooked or misunderstood, and in farming circles their very presence on crops is often seen to be unwelcome. In reality, however, many insects are genuinely beneficial, as in the case of parasitic and predacious species. The use of chemical pesticides to control crop pests is becoming more tightly regulated and environmentally undesirable, and low-input farming, in which natural enemies of pests are encouraged to survive or increase, is becoming far more prevalent. Accordingly, Integrated Pest Management (IPM) and Integrated Pest Management (ICM) strategies are increasingly being developed, advocated and adopted. Features: Highlights information on many groups of insects and mites that act as natural enemies or biological control agents of phytophagous insects and mites, including plant pests. Profusely illustrated with high-quality colour photographs. Focuses mainly on insects and mites as natural enemies of plant pests, including parasitic and predacious species that have been accidentally or deliberately introduced in classical biological control programmes. Reviews the role of phytophagous European insects and mites in controlling or managing European plants that have become invasive weeds in other parts of the world, notably North America, Australia and New Zealand.
