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Author: Lionel Gil
Publisher:
ISBN: 9789562919920
Category :
Languages : es
Pages : 432
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Book Description
Author: Lionel Gil
Publisher:
ISBN: 9789562919920
Category :
Languages : es
Pages : 432
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Book Description
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251091870
Category : Social Science
Languages : en
Pages : 37
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Book Description
The understanding that some pesticides are more hazardous than others is well established. Recognition of this is reflected by the World Health Organization (WHO) Recommended Classification of Pesticides by Hazard, which was first published in 1975. The document classifies pesticides in one of five hazard classes according to their acute toxicity. In 2002, the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) was introduced, which in addition to acute toxicity also provides classification of chemicals according to their chronic health hazards and environmental hazards.
Author: Etats-Unis. Federal highway administration
Publisher:
ISBN: 9781886679283
Category : Invasive plants
Languages : en
Pages : 394
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Book Description
Author:
Publisher: Bib. Orton IICA / CATIE
ISBN:
Category :
Languages : en
Pages : 92
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Book Description
Author: United States. Bureau of Labor Statistics
Publisher:
ISBN:
Category : Labor supply
Languages : en
Pages : 126
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Book Description
Author: William E. Doolittle
Publisher: University of Texas Press
ISBN: 0292729537
Category : Social Science
Languages : en
Pages : 220
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Book Description
Prehistoric farmers in Mexico invented irrigation, developed it into a science, and used it widely. Indeed, many of the canal systems still in use in Mexico today were originally begun well before the discovery of the New World. In this comprehensive study, William E. Doolittle synthesizes and extensively analyzes all that is currently known about the development and use of irrigation technology in prehistoric Mexico from about 1200 B.C. until the Spanish conquest in the sixteenth century A.D. Unlike authors of previous studies who have focused on the political, economic, and social implications of irrigation, Doolittle considers it in a developmental context. He examines virtually all the known systems, from small canals that diverted runoff from ephemeral mountain streams to elaborate networks that involved numerous large canals to irrigate broad valley floors with water from perennial rivers. Throughout the discussion, he gives special emphasis to the technological elaborations that distinguish each system from its predecessors. He also traces the spread of canal technology into and through different ecological settings. This research substantially clarifies the relationship between irrigation technology in Mexico and the American Southwest and argues persuasively that much of the technology that has been attributed to the Spaniards was actually developed in Mexico by indigenous people. These findings will be important not only for archaeologists working in this area but also for geographers, historians, and engineers interested in agriculture, technology, and arid lands.
Author: Thomas S. Schulenberg
Publisher: Princeton University Press
ISBN: 140083449X
Category : Nature
Languages : en
Pages : 665
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Book Description
The best guide to the birds of Peru—now in a revised paperback edition Birds of Peru is the most complete and authoritative field guide to this diverse, neotropical landscape. It features every one of Peru's 1,817 bird species and shows the distinct plumages of each in 307 superb, high-quality color plates. Concise descriptions and color distribution maps are located opposite the plates, making this book much easier to use in the field than standard neotropical field guides. This fully revised paperback edition includes twenty-five additional species. A comprehensive guide to all 1,817 species found in Peru—one fifth of the world's birds--with subspecies, sexes, age classes, and morphs fully illustrated Designed especially for field use, with vivid descriptive information and helpful identification tips opposite color plates Detailed species accounts, including a full-color distribution map Includes 25 additional species not covered in the first edition Features 3 entirely new plates and more than 25 additional illustrations
Author: Laura E. Powers
Publisher: Cengage Learning
ISBN:
Category : Business & Economics
Languages : en
Pages : 468
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Book Description
Introduction to ecology and ecological principles for agricultural students with no prior coursework in ecology.
Author: Gabriel Feld
Publisher: Exemplary Projects
ISBN: 9781870890762
Category : Architecture
Languages : en
Pages : 0
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Book Description
Berlin Free University is an imagination of what a building might be - a building designed to function as a piece of the city, adapting to the needs of its users while generating opportunities for social interaction. The university offers a window onto the politicized and optimistic discourse of the Sixties and Seventies, but at the same time illuminates contemporary debates around large projects of infrastructure and public space. This extensive study of the building combines texts with a visual survey containing specifically commissioned photographs as well as archive material, plans and construction details.
Author: Gordon R. Conway
Publisher: Routledge
ISBN: 113406358X
Category : Law
Languages : en
Pages : 677
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Book Description
Agriculture Pollutes: pesticides can destroy wildlife and some are toxic to humans; some fungicides and herbicides cause cancer. Nitrates result in the contamination of drinking water and produce the risk of the blue-baby syndrome in infants and of stomach cancer in adults. Agriculture produces methane, ammonia, nitrous oxide and the products of burning off, all of which add to the world's problems of acid rain, depletion of the ozone layer and global warming. This book, which focuses on the UK, the USA and Third World countries, is the first comprehensive review of agriculture and pollution: it examines the facts and assesses the relative dangers of each pollution problem. It also considers the effects of pollution on agriculture itself crop yields are depressed and livestock damaged by various forms of pollution from all sources. The authors offer solutions to these apparently overwhelming problems, and describe existing technology which would allow us to deal with them. Originally published in 1991
