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Author:
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 1228
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Book Description
Author:
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 1228
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Book Description
Author: David Eltis
Publisher: Routledge
ISBN: 1136314598
Category : History
Languages : en
Pages : 161
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Book Description
Containing records of some 25,000 slaving voyages between 1595 and 1867, this data set forms the basis of most of the papers included in this collection. Other papers offer quantitative analysis in the ethnicity of slaves, mortality trends and slaves' reconstruction of their identities.
Author:
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 828
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Book Description
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 926
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Book Description
Author: A.E. Hall
Publisher: Springer Science & Business Media
ISBN: 3642673287
Category : Science
Languages : en
Pages : 357
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Book Description
The semi-arid zones of the world are fragile ecosystems which are being sub stantially modified by the activities of mankind. Increasing human populations have resulted in greater demands on semi-arid zones for providing human susten ance and the possibility that this may enhance desertification is a grave concern. These zones are harsh habitats for humans. The famines that resulted from drought during the late 1960's and the 1970's in the African Sahel illustrated the unreliability of present agricultural systems in this zone. Large fluctuations in ag ricultural production have occurred in semi-arid zones of Australia, North Ameri ca, and the Soviet Union due to periodic droughts, even though considerable ag ricultural technology has been devoted to agricultural development in these zones. The challenge to mankind is to manage these different semi-arid zones so that pro ductivity is increased and stabilized, and environmental deterioration is decreased. Irrigation can be used to increase and stabilize agricultural production in semi-arid zones as discussed in Volume 5 of this series, Arid Zone Irrigation. The present volume, Agriculture in Semi-Arid Environments, focuses on dryland farming in semi-arid zones, and is relevant to the large areas of the world where rainfall is limiting and where water is not available for irrigation. This volume is designed to assist agricultural development in these areas and consists of reviews and analyses of available information by scientists working in Africa, Australia, and at the U ni versity of California.
Author:
Publisher:
ISBN:
Category : Industries
Languages : en
Pages : 434
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Book Description
Author: United States. Dept. of Commerce. Office of Publications
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 76
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Book Description
Author: United States. Department of Commerce
Publisher:
ISBN:
Category : Commerce
Languages : en
Pages : 72
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Book Description
Author: National Weather Records Center (U.S.)
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 120
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Book Description
Author: U.S. National Committee for the International Hydrological Decade
Publisher: National Academies
ISBN:
Category : Hydrological stations
Languages : en
Pages : 84
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Book Description
