Résultats de la recherche

1. Library Resource

   

   Epidemiology of bovine anaplasmosis and babesiosis in the lowland tropics of Colombia

   Documents et rapports de conférence

   décembre, 1977

   Colombie, Amérique centrale, Amérique du Sud
2. Library Resource

   

   Descripción de las enfermedades de la yuca [conjunto audiotutorial]

   Articles et Livres

   décembre, 1977

   Colombie, Amérique du Sud, Amérique centrale

   utilisation des terres

   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.

3. Library Resource

   

   Cruzamiento del fríjol [conjunto audiotutorial]

   Articles et Livres

   décembre, 1977

   Colombie, Amérique du Sud, Amérique centrale

   utilisation des terres

   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.

4. Library Resource

   

   Soil conservation and management in developing countries. Report of an Expert Consultation, Rome, 22-26 November 1976

   Articles et Livres

   décembre, 1977

   Kenya, Maroc, Nigéria, Philippines, Chine, République-Unie de Tanzanie, Inde, Australie, Canada, Tunisie, Venezuela, Malawi, Pakistan, Ghana

   gestion des ressources naturelles

   gestion foncière

   A major problem facing the areas already under cultivation, is the seriousness of soil degradation and loss of soil fertility due to indiscriminate misuse of agricultural lands, forests and grazing lands. The modern thinking assigns to soil conservation a comprehensive and more positive role than in the past. in that sustained improvement complemented by the preservation of available resources should form the central concept. Soil conservation must not be limited solely to agricultural and grazing lands.

5. Library Resource

   

   Assessing soil degradation. Report of an FAO/UNEP Expert Consultation, Rome, 18-20 January 1977

   Articles et Livres

   décembre, 1977

   France, 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

   Terres, changement climatique et environnement

   gestion des ressources naturelles

   désertification

   gestion foncière

   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.