Résultats de la recherche
Showing items 1 through 9 of 24.-
Library ResourceRapports et recherchesdécembre, 1989
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Library ResourceArticles et Livresdécembre, 1989
Summarises past and present experiences with livestock performance testing in sub-Saharan Africa and outlines the role of networks in improving on-farm testing through the use of standardised testing methods and rapid data handling and feedback. Includes data on the distribution of cattle and sheep populations by ecological zone in sub-Saharan Africa. Presents current programmes for on-farm and on-station performance recording.
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Library ResourceRapports et recherchesdécembre, 1989Zimbabwe, Afrique, Afrique australe
Throughout Africa the importance of land use issues in relation to tsetse control planning has been emphasized consistently in the tsetse literature. Because of inappropriate land use, concerns for the environment in tsetse-freed areas have been expressed frequently. This debate is very relevant to Zimbabwe, where extensive tsetse control operations in recent years have confined the remaining area of tsetse infestation to parts of the Zambezi valley, a semi-arid region of the country with a fragile eco-system and limited agricultural potential.
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Library ResourceDocuments et rapports de conférencedécembre, 1989Éthiopie, Afrique, Afrique orientale
Reviews the extent and use of crop residues as livestock feeds in Ethiopia with special emphasis to wheat with respect to varietal difference and agronomic practices to enhance the utilisation of the straw. Lists area and yield of major crops in Ethiopia. Presents data on yield & chemical composition of various crop residues, weight gains of steers fed crop residue, and effect of N fertilization on grain yield and quality & quantity of wheat straw. Also summarises results of an undersowing trials of forage crops to wheat.
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Library ResourceArticles et Livresdécembre, 1989
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Library ResourceArticles et Livresdécembre, 1989Éthiopie, Afrique, Afrique orientale
Investigates the effects of improved surface drainage on the productivity of Vertisols in a wheat-and-chickpea cropping trial conducted in 1987 at ILCA;s Debre Zeit research site in the Ethiopian highlands. Chickpea plots were subjected to four irrigation treatments, viz, no irrigation, irrigation at planting, 35 days and 70 days after planting. The trial showed that with a starter irrigation to aid the germination of a second crop, sequential cropping of two crops in the same growing season is feasible in the Debre Zeit.
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Library ResourceArticles et Livresdécembre, 1989Sri Lanka, Asia du sud-est
Taking System H of the Mahaweli Program in Sri Lanka as a case study, this paper investigates a field still largely unexplored - the agency and its capacity to manage an irrigation system.
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Library ResourceRapports et recherchesdécembre, 1989
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Library Resource
Guía de estudio para ser usada como complemento de la unidad videotutorial sobre el mismo tema
Manuels et directivesdécembre, 1989 -
Library ResourceArticles et Livresdécembre, 1989Sri Lanka, Asia du sud-est
This paper analyzes the impact of settlement policies on irrigation management in a new irrigated settlement scheme in southern Sri Lanka based on field research in 1988. It provides policy recommendations for improvements on this scheme and in future schemes.
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