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Library ResourceEnero, 1992Malí
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Library ResourceEnero, 1992Nigeria
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Library ResourceEnero, 1991Guinea-Bissau
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Library ResourceEnero, 1991Sierra Leona
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Library ResourceArtículos de revistas y librosDiciembre, 1991Senegal
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Library ResourceArtículos de revistas y librosDiciembre, 1991Nigeria, África, África occidental
In agriculture, surveying is required to prepare topographical maps that indicate variations in the level of the land's surface. Topographical maps are necessary as a base for the preparation of research station maps which include layout of field, buildings, roads, and soil conservation measures.
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Library ResourceDocumentos de política y resúmenesDiciembre, 1991Angola, Nigeria, Mauritania, Guinea, Sudán, Ghana, Namibia, África
Agriculture, forestry and fishing are important sectors of Ghana's economy and improvement in the performance of these sectors is central to the country's current economic recovery programme.1 The severe economic decline which the country went through between the early 1970's and the early 1980's affected poorer socio-economic groups in particular 2 through depressed wage levels and increased unemployment.
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Library ResourceArtículos de revistas y librosDiciembre, 1991Francia, Zambia, Afganistán, Zimbabwe, Australia, Grecia, Guinea, Etiopía, Pakistán, Colombia, Panamá, Kenya, Jordania, Filipinas, Libia, Italia, Botswana, Países Bajos, Argentina, Sudán, Europa, Asia, África, América Septentrional
Extensive grazing is the predominant form of land use on at least a quarter of the world’s land surface, in which livestock are raised on food that comes mainly from rangelands. Extensive grazing differs from crop or forestry production, in which the produce remains in situ whilst growing. Evaluation for extensive grazing, unlike that for cropping or forestry, must take into account the production of both grazing forage, termed primary production, and the livestock that feed on this forage, termed secondary production.
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Library ResourceDocumentos de política y resúmenesDiciembre, 1991Ghana, África
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Library ResourceArtículos de revistas y librosDiciembre, 1991Egipto, Bangladesh, Nigeria, Kenya, Israel, Chile, Perú, China, Etiopía, República de Corea, Níger, Tailandia, Nepal, Marruecos, Filipinas, Somalia, Italia, Tanzania, India, Sudán, Brasil
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