Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 19.
  1. Library Resource
    Articles et Livres
    décembre, 1989
    Amérique latine et Caraïbes

    Recoge textos elaborados en los últimos años por expertos de la CEPAL y por autores externos para la Unidad Conjunta CEPAL/CNUAH de Asentamientos Humanos, en cumplimiento de su programa de trabajo. Los textos se agrupan segun 3 líneas temáticas, 1) Areas críticas para la formulación de políticas de asentamiento humano en América Latina y el Caribe, 2) Metropolización y crisis, y 3) Planificación y gestión del desarrollo nacional: el rol de los gobiernos locales.

  2. Library Resource
    Articles et Livres
    décembre, 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.

  3. Library Resource
    Articles et Livres
    décembre, 1989
    Éthiopie, 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.

  4. Library Resource
    Articles et Livres
    décembre, 1989
    Pakistan, Asie méridionale

    This paper is a preliminary effort to define the extent of irrigation in Pakistan's mountain regions. Attention is given to some changes already begun in this environment through new irrigation development activities. Important knowledge gaps that need to be filled by more systematic and multidisciplinary research are identified.

  5. Library Resource
    Articles et Livres
    décembre, 1989
    Pakistan, Asie méridionale

    This paper presents an overview of the current state of knowledge on the relations between irrigation management in Pakistan and the incidence of waterlogging and salinity. It is emphasized that management research should focus on the whole system, including surface and ground water resources. The paper also highlights key management questions that need to be addressed such as salt and water balance and water loss from canals, water courses and field channels.

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