Download or read book From Coastal Wilderness to Fruited Plain written by Gordon G. Whitney and published by Cambridge University Press. This book was released on 1996-08-29 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: From Coastal Wilderness to Fruited Plain is an account of the making of a large part of the American landscape following European settlement. Drawing upon land survey records and early travellers' accounts, Dr Whitney reconstructs the 'virgin' forests and grasslands of the north-eastern and central United States during the pre-settlement period. He then documents successively the clearance and fragmentation of the region's woodlands, the harvest of the forest and its game, the ploughing of the prairies, and the draining of wetlands. The degree to which these activities altered the soil, climate, plant and animal communities, and water cycle are evaluated, and the sustainability of present-day ecosystems is brought into question in this account.
Download or read book A History of Public Health written by George Rosen and published by JHU Press. This book was released on 2015-04 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: For seasoned professionals as well as students, A History of Public Health is visionary and essential reading.
Download or read book History of Public Health in New York City 1625 1866 written by John Duffy and published by Russell Sage Foundation. This book was released on 1968-10-15 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traces the development of the sanitary and health problems of New York City from earliest Dutch times to the culmination of a nineteenth-century reform movement that produced the Metropolitan Health Act of 1866, the forerunner of the present New York City Department of Health. Professor Duffy shows the city's transition from a clean and healthy colonial settlement to an epidemic-ridden community in the eighteenth century, as the city outgrew its health and sanitation facilities. He describes the slow growth of a demand for adequate health laws in the mid-nineteenth century, leading to the establishment of the first permanent health agency in 1866.
Download or read book Field Manual of Wildlife Diseases written by and published by Geological Survey (USGS). This book was released on 1999 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Publishers Weekly written by and published by . This book was released on 1974 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Democracy and Education written by John Dewey and published by Createspace Independent Publishing Platform. This book was released on 1916 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: . Renewal of Life by Transmission. The most notable distinction between living and inanimate things is that the former maintain themselves by renewal. A stone when struck resists. If its resistance is greater than the force of the blow struck, it remains outwardly unchanged. Otherwise, it is shattered into smaller bits. Never does the stone attempt to react in such a way that it may maintain itself against the blow, much less so as to render the blow a contributing factor to its own continued action. While the living thing may easily be crushed by superior force, it none the less tries to turn the energies which act upon it into means of its own further existence. If it cannot do so, it does not just split into smaller pieces (at least in the higher forms of life), but loses its identity as a living thing. As long as it endures, it struggles to use surrounding energies in its own behalf. It uses light, air, moisture, and the material of soil. To say that it uses them is to say that it turns them into means of its own conservation. As long as it is growing, the energy it expends in thus turning the environment to account is more than compensated for by the return it gets: it grows. Understanding the word "control" in this sense, it may be said that a living being is one that subjugates and controls for its own continued activity the energies that would otherwise use it up. Life is a self-renewing process through action upon the environment.
Download or read book Insect Pollination of Cultivated Crop Plants written by Samuel Emmett McGregor and published by . This book was released on 1976 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Pioneer Experiment Station 1875 1975 written by James Gordon Horsfall and published by . This book was released on 1992 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: A History of the Connecticut Agricultural Experiment Station in New Haven, Connecticut.
Download or read book Classical Biological Control of Bemisia tabaci in the United States A Review of Interagency Research and Implementation written by Juli Gould and published by Springer Science & Business Media. This book was released on 2008-03-01 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews interagency research and development of classical (importation) biological control of Bemisia tabaci (biotype B) conducted in the USA from 1992- 2002. The successful discovery, evaluation, release, and establishment of at least five exotic B. tabaci natural enemies in rapid response to the devastating infestations in the USA represents a landmark in interagency cooperation and coordination of multiple disciplines. The review covers all key aspects of the classical biocontrol program, beginning with foreign exploration and quarantine culture, through dev- opment of mass rearing methodology, laboratory and field evaluation for efficacy, to field releases, integration with other management approaches, and monitoring for establishment and potential non-target impacts. The importance of morphological and molecular taxonomy to the success of the program is also emphasized. The book’s contributors include 28 USDA, state department of agriculture, and univ- sity scientists who participated in various aspects of the project. Bemisia tabaci continues to be a pest of major concern in many parts of the world, especially since the recent spread of the Q biotype, so the publication of a review of the biological control program for the B biotype is especially timely. We anticipate that our review of the natural enemies that were evaluated and which have established in the USA will benefit researchers and IPM practitioners in other nations affected by B. tabaci.
Download or read book The Cereal Rusts Origins specificity structure and physiology written by William Rodgers Bushnell and published by . This book was released on 1984 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Origins, specificity, structure, and physiology; Evolution at the center of origin; Taxonomy of the cereal rust fungi; Specificity; The formae speciales; Race specificity and methods of study; Genetics of the pathogen: host association; Histology and molecular biology of host: parasite; Virulence frequency dynamics of cereal rust fungi; The rust fungus; Controlled infection by Puccinia graminis f.sp. tritici under artificial conditions; Developmental ultrastructure of hyphae and spores; Development and physical of teliospores; Obligate parasitism and axenic culture; The host parsite interface; The rusted host; Effects of rust on plant development in relation to the translocation of inorganic and organic solutes.
Download or read book Alcohol and Public Policy written by National Research Council and published by National Academies Press. This book was released on 1981-02-01 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Plant Diseases written by George B. Lucas and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every year we see a remarkable increase in scientific knowledge. We are learning more each day about the world around us, about the numerous biological organisms of the biosphere, about the physical and chemical processes that shaped and continue to change our planet. The cataloging, retrieval, dissemination, and use of this new information along with the continued development of new computer technology provide some of the most challenging problems in science as we enter the Information Age. With the explosion of knowledge in science, it is especially important that students in introductory courses learn not only the basic material of a subject, but also about the newest developments in that subject. With this goal in mind, we have prepared a second edition of Introduction to Plant Diseases: Identification and Management. We prepared this edition with the same general purpose that we had for the first edition - to provide practical, up-to-date information that helps in the successful management of diseases on food, fiber, and landscape plants for students who do not have a strong background in the biological sciences. We included new information on (1) the precise identification of diseases and the pathogens that cause them, (2) the development of epidemics of plant diseases, (3) the application of biotechnology in plant pathology, (4) the use of alternative methods of crop production and disease management that help protect the environment, and (5) diseases that have become more important since the first edition was published.
Download or read book Current Catalog written by National Library of Medicine (U.S.) and published by . This book was released on 1983 with total page 1442 pages. Available in PDF, EPUB and Kindle. Book excerpt: First multi-year cumulation covers six years: 1965-70.
Download or read book National Union Catalog written by and published by . This book was released on 1973 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes entries for maps and atlases.
Download or read book Integrated Pest Management written by Rajinder Peshin and published by Springer. This book was released on 2009-04-29 with total page 1324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This interdisciplinary text offers updated knowledge on pest management. It discusses dissemination and impact on a range of crops across the globe on industrialized and subsistence level farms. It also explores the effect of the green revolution on IPM.
Download or read book New York State Government written by Robert B. Ward and published by SUNY Press. This book was released on 2006-12-07 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: An expanded and updated edition of the 2002 book that has become required reading for policymakers, students, and active citizens.
Download or read book Subject Catalog written by Library of Congress and published by . This book was released on 1978 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
