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Author: Unesco
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 664
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Author: Unesco
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 664
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Author: István Szabolcs
Publisher:
ISBN: 9789230019334
Category : Alkali lands
Languages : en
Pages : 0
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Author: UNESCO
Publisher:
ISBN:
Category :
Languages : fr
Pages : 655
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Author: Bernan Associates
Publisher:
ISBN: 9789231016257
Category :
Languages : en
Pages : 655
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Author:
Publisher:
ISBN:
Category :
Languages : de
Pages : 655
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Author: Unesco
Publisher:
ISBN:
Category : Savanna ecology
Languages : en
Pages : 0
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Author: Henry N. Le Houerou
Publisher: Springer Science & Business Media
ISBN: 3642744575
Category : Technology & Engineering
Languages : en
Pages : 291
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7. 2 The Pilot Zone of the FerIo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157 7. 2. 1 Geographical Zoning and Administrative Setup. . . . . . . . . . . . . 157 7. 2. 2 Climate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 7. 2. 3 The Substratum. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161 7. 2. 4 Surface Water. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 7. 2. 5 Vegetation and Rangelands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 7. 2. 6 Wildlife. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168 7. 2. 7 Livestock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168 7. 2. 8 Evolution of Land Use and History of Development . . . . . . . . 170 7. 3 Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181 7. 3. 1 Principles, Problems and Methods . . . . . . . . . . . . . . . . . . . . . . . . 181 7. 3. 2 Evaluation of Green Herbaceous Biomass by Orbital Remote Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188 7. 3. 3 Evaluation of Range Production from Ground Sampling . . . . 207 7. 3. 4 Low Altitude Systematic Reconnaissance Flights (SRF) . . . . . . 211 7. 3. 5 Practical Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 7. 4 Conclusions on Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233 8 General Conclusions: Towards an Ecological Management of the Sahelian Ecosystems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241 Subject Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269 of Scientific Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275 . . . . . . . . . . . . Index Animals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275 Plants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277 VII Abbreviations and Acronyms AVHRR Advanced Very High Resolution Radiometer CILSS Comite Inter-Etats de Lutte contre la Secheresse au Sahel CIPEA Centre International pour l'Elevage en Afrique CNRS Centre National de la Recherche Scientifique CP Crude Protein (N x 6.
Author: R. M. Lawton
Publisher:
ISBN:
Category : Land use
Languages : en
Pages : 216
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Author: R.O. Whyte
Publisher: Springer Science & Business Media
ISBN: 9401023255
Category : Science
Languages : en
Pages : 233
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1.1 Objective and scope These chapters are not intended as a treatise on range management of tropical grazing lands, nor on the agronomy of sown pastures and cultivated fodder crops, aspects of applied science that are only one stage above scientific farming and use of land. An attempt is made to present the vegetation sciences, or botany and ecology in their widest aspects, as the essential background for their application in economic land use and plant and animal husbandry. The basic thesis is that science is global, but that its practical application is restricted to specific biological and socio economic habitats. The region covered is termed the intertropical zone. This comprises the equatorial latitudes, the tropics and subtropics. It is not only that part of the globe lying between latitudes 30° north and south of the Equator, as proposed by some writers (DAVIES, W., 1960; repeated by DAVIES & SKIDMORE, 1966). Rather is it those regions of the world in which, at the lower elevations, certain families and members of the Gramineae and Leguminosae grow wild or can be cultivated. It may be a matter for discussion whether these plants in their wild communities or sown or planted crop mixtures are better indicators of a biological environment than the instruments and criteria of the meteorologists.
Author: National Research Council (U.S.). Board on Science and Technology for International Development
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 392
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