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.
Résultats de la recherche
Showing items 1 through 9 of 11.-
Library ResourceArticles et Livresdécembre, 1991Nigéria, Afrique, Afrique occidentale
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Library ResourceArticles et Livresdécembre, 1991Portugal, France, Libéria, Ghana, Congo, Madagascar, Gabon
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Library ResourceDocuments de politique et mémoiresdécembre, 1991Angola, Nigéria, Mauritanie, Guinée, Soudan, Ghana, Namibie, Afrique
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 ResourceArticles et Livresdécembre, 1991France, Zambie, Afghanistan, Zimbabwe, Australie, Grèce, Guinée, Éthiopie, Pakistan, Colombie, Panama, Kenya, Jordanie, Philippines, Libye, Italie, Botswana, Pays-Bas, Argentine, Soudan, Europe, Asie, Afrique, Amérique septentrionale
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 ResourceArticles et Livresdécembre, 1991Fidji, Bangladesh, Nigéria, Népal, Israël, Pérou, Sri Lanka, Indonésie, Bulgarie, Ghana, Congo, Guinée, Niger, Kenya, Yémen, Australie, République-Unie de Tanzanie, Équateur, Argentine, Inde, Sénégal, Tchad, Chine, Togo
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Library ResourceDocuments de politique et mémoiresdécembre, 1991Ghana, Afrique
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Library ResourceArticles et Livresdécembre, 1991Égypte, Bangladesh, Nigéria, Kenya, Israël, Chili, Pérou, Chine, Éthiopie, République de Corée, Niger, Thaïlande, Népal, Maroc, Philippines, Somalie, Italie, République-Unie de Tanzanie, Inde, Soudan, Brésil
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Library ResourceRapports et recherchesdécembre, 1991Guinée, France, Canada
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Library ResourceConstitutiondécembre, 1991Sierra Leone
The constitution was adopted by Parliament and approved in a national referendum.
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Library ResourceConstitutiondécembre, 1991Mauritanie
The constitution was approved by 97.94% of voters.
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