Produccion de semillas en el año forestal 1954-55 y consumo durante 1955 PDF Download
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Author: Servicio de Semillas Forestales
Publisher:
ISBN:
Category :
Languages : es
Pages : 0
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Author: Servicio de Semillas Forestales
Publisher:
ISBN:
Category :
Languages : es
Pages : 0
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Author: Daniel M. Brooks
Publisher: IUCN
ISBN: 9782831704227
Category : Acrocodia
Languages : en
Pages : 176
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Book Description
Descended from a long and ancient lineage, tapirs are important tropical forest seed dispersers. However, today, all species of tapirs are threatened to various degrees by habitat destruction and hunting. This action plan was written with wildlife biologists, ecologists, administrators, educators and local conservation officials in mind and is aimed at those countries with tapir populations. It provides a brief natural history of each species and its objective is to aid in their conservation by catalyzing conservation action. In addition, it is hoped that the contents of the plan will stimulate further research into this fascinating group of animals.
Author: Lester R. Brown
Publisher: W. W. Norton & Company
ISBN: 0393344150
Category : Nature
Languages : en
Pages : 161
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Book Description
With food supplies tightening, countries are competing for the land and waterresources needed to feed their people.
Author: Commission for Environmental Cooperation (Montréal, Québec). Secretariat
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 240
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Book Description
The North American Mosaic has four overarching features. First, it is, to the extent feasible, based on comparable information on the status and trends of major indicators of the state of the environment in Canada,Mexico, and the United States. Second, the report confirms that these three countries together make up an incredibly complex, dynamic, and interconnected ecosystem in which humans play a dominant and decisive role. Third, the report raises important and sometimes disquieting questions concerning the sustainability of some current trends. Finally, the report is a reminder that our economic, social, and physical well-being are utterly dependent on the life-sustaining services provided by nature. This report emphasizes the importance of developing mutually compatible economic, social, and environmental goals and policies across the three-country region.
Author: Park S. Nobel
Publisher: Univ of California Press
ISBN: 9780520231573
Category : Nature
Languages : en
Pages : 304
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Book Description
"There is nothing in the world like this book. It should be in every library and on the bookshelves of all those interested in cacti. The book will be an important resource for plant physiology, agronomy, and horticulture classes at both the undergraduate and graduate level."—Bruce Smith, Brigham Young University "Cacti: Biology and Uses is a landmark publication of one of the world's most unique group of plants. Park Nobel, a leading authority on succulent plants, has assembled a collection of contributions that spans a wide range of issues extending from basic systematics, anatomy, physiology and ecology to considerations of conservation and human uses of this diverse group of plants. This nicely-produced and well-illustrated volume provides a resource that will be of great use to a wide range of scientists, practitioners, and enthusiasts of this plant group."—Harold Mooney, Paul S. Achilles Professor of Environmental Biology, Stanford University
Author: Guillermo Floris Margadant S.
Publisher:
ISBN:
Category : Law
Languages : en
Pages : 408
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Author: Norman N Potter
Publisher: Springer
ISBN: 9789401572637
Category :
Languages : en
Pages : 752
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Author: United States. Bureau of Labor Statistics
Publisher:
ISBN:
Category : Labor supply
Languages : en
Pages : 126
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Book Description
Author: Barry Nestel
Publisher:
ISBN:
Category : Cassava as feed
Languages : en
Pages : 147
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Book Description
Author: E.G. Gregorich
Publisher: Elsevier
ISBN: 0080541402
Category : Technology & Engineering
Languages : en
Pages : 465
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Book Description
Soil is a complex body that exists as many types, each with diverse properties that may vary widely across time and space as a function of many factors. This complexity makes the evaluation of soil quality much more challenging than that of water or air quality. Evaluation of soil quality now considers environmental implications as well as economic productivity, seeking to be more holistic in its approach.Thus, soil quality research draws from a wide range of disciplines, blending the approaches of biologists, physicists, chemists, ecologists, economists and agronomists, among others.This book presents a broad perspective of soil quality that includes these various perspectives and gives a strong theoretical basis for the assessment of soil quality.A short glossary provides definitions for terms used throughout the book.
