Increasing interest in the federally owned lands by individuals and groups representing a broad cross section of society has intensified public land management problems. Pressures for preservation, conservation, and additional non-market uses have resulted in management conflicts.
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Showing items 1 through 9 of 16.-
Library ResourceArticles et Livresdécembre, 1977
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Library ResourceArticles et Livresdécembre, 1977France, Nigéria, Espagne, Zambie, Iraq, Australie, Côte d'Ivoire, Kenya, Jordanie, Maroc, République arabe syrienne, Libye, Somalie, Madagascar, République-Unie de Tanzanie, Botswana, Argentine, Inde, Soudan, Liban
There is a urgent need for a better understanding of the risks of soil degradation and their geographical distribution as well as a better knowledge of where degradation occurs at present. it would be desirable to combine soil conservation activities with other elements for increasing crop production.Erosion, salinity and alkalinity and the loss of soil fertility seriously reduce the natural potential of soils to produce food fibres. During the meeting, many criteria to assess the various types of soil degradation were outlined by the experts.
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Library ResourceArticles et Livresjuillet, 1977
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Library ResourceArticles et Livresdécembre, 1977Ghana, Italie
An international journal of forestry and forest industries
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Library ResourceArticles et Livresdécembre, 1977Colombie, Amérique du Sud, Amérique centrale
This audiotutorial unit (cassette, printed script, 139 color slides, study guide, self-evaluation test), prepared by the Communications Support Unit at CIAT, is available for use with a manually or automatically synchronized slide projector/cassette tape recorder. Each unit is available from the Distribution Office at a cost of US$$50; photocopies of the study guide alone can be obtained from the Bean Information Center. Hybridization or crossing constitutes the principal means for genetic improvement of plants.
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Library ResourceArticles et Livresdécembre, 1977Colombie, Amérique du Sud, Amérique centrale
This audiotutorial unit (cassette, printed script, 93 color slides, Study guide, self-evaluation test), prepared by the Communications Support Unit at CIAT, is available for use with a manually or automatically synchronized slide projector/cassette tape recorder. Each unit is available from the Distribution Office at a cost of US$ 50; photocopies of the study guide alone can be obtained from the Cassava Information Center. One of the main factors limiting to cassava production is disease.
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Library ResourceArticles et Livresdécembre, 1977Mali, Afrique, Afrique occidentale
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Library ResourceArticles et Livresdécembre, 1977
Land use policy unquestionably requires information about land ownership. During the Congressional debate on the Land Use Policy and Planning Assistance Act of 1972, Senator Henry Jackson of Washington recognized the need for land ownership information when he said: "Rational land use planning would be impossible without knowledge of patterns of land ownership within a given area." (1) Yet this information is not generally available for the planning process.
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Library ResourceArticles et Livresjuillet, 1977
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Library ResourceArticles et Livresdécembre, 1977
This study seeks to contribute to the development of procedures which provide useful information to decision-makers and affected people regarding the national income and employment impacts of railroad branch line abandonment. There are three major parts to this paper. The first part probes the underlying assumptions of public investment analysis. It is noted that non-Pareto optimal welfare changes occur whether or not abandonment takes place.
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