Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 8.
  1. Library Resource
    Articles et Livres
    décembre, 2014
    Sénégal, Mauritanie, Mali, Burkina Faso, Algérie, Niger, Nigéria, Tchad, Soudan, Soudan du Sud, Érythrée, Cameroun, République centrafricaine, Éthiopie, Afrique, Afrique sub-saharienne, Afrique centrale, Afrique orientale, Afrique septentrionale, Afrique australe, Afrique occidentale

    In Africa, where most agriculture is rainfed, crop growth is limited by water availability. Rainfall variability during a growing season generally translates into variability in crop production. While the seasonality of rainfall in the drier rangelands can play a significant role in productivity, rain-use efficiency (RUE)—the amount of biomass produced (in kilograms of dry matter per hectare) per millimeter of rainfall—also drives production.

  2. Library Resource
    Publication évaluée par des pairs
    octobre, 2014
    Algérie, Soudan, Burkina Faso, Nigéria, Mauritanie, Tchad, Mali, Cameroun, Sénégal, République centrafricaine, Soudan du Sud, Éthiopie, Niger, Érythrée

    The Sahel has been the focus of scientific interest in environmental-human dynamics and interactions. The objective of the present study is to contribute to the recent debate on the re-greening of Sahel. The paper examines the dynamics of barren land in the Sahel of Burkina Faso through analysis of remotely-sensed and rainfall data from 1975–2011. Discussions with farmers and land management staff have helped to understand the anthropogenic efforts toward soil restoration to enable the subsistence farming agriculture.

  3. Library Resource
    Publication évaluée par des pairs
    octobre, 2014
    Algérie, Soudan, Burkina Faso, Nigéria, Mauritanie, Tchad, Mali, Cameroun, Soudan du Sud, République centrafricaine, Sénégal, Éthiopie, Niger, Érythrée

    Climatic stress and anthropogenic disturbances have caused significant environmental changes in the Sahel. In this context, the importance of soil is often underrepresented. Thus, we analyze and discuss the interdependency of soil and vegetation by classifying soil types and its woody cover for a region in the Senegalese Ferlo. Clustering of 28 soil parameters led to four soil types which correspond with local Wolof denotations: Dek, Bowel, Dior and Bardial.

  4. Library Resource
    Publication évaluée par des pairs
    décembre, 2014
    Algérie, Soudan, Burkina Faso, Nigéria, Mauritanie, Tchad, Mali, Cameroun, Sénégal, République centrafricaine, Soudan du Sud, Éthiopie, Niger, Érythrée, Afrique

    Crown diameter and tree density were measured in 52 communities in the Sudan-Sahel using satellite imagery to determine the relationships between rainfall and distance from community center to crown size diameter and tree density. As distance from the community center increased, tree density and crown diameter decreased. As rainfall increased, tree density decreased while crown diameter increased. Distance from the community center is a proxy for age since urbanization and our results indicate that older parts of communities show longer and more consistent tree management.

  5. Library Resource
    Rapports et recherches
    décembre, 2014
    Égypte, Nigéria, États-Unis d'Amérique, Zambie, Mali, Zimbabwe, Indonésie, Ghana, Congo, Éthiopie, Niger, Thaïlande, Mozambique, Maroc, Philippines, Ouganda, Madagascar, République-Unie de Tanzanie, Cambodge, Sénégal, Soudan, Brésil

    There is growing evidence that investing in developing countries’ agricultural sector is among the most efficient ways to reduce poverty and hunger. Agricultural investments can generate a wide range of developmental benefits, but these benefits cannot be expected to arise automatically and some forms of large-scale investment carry risks for host countries. Although there has been much debate about the potential benefits and risks of international investment, there is a lack of systematic evidence on the actual impacts on the host country and their determinants.

  6. Library Resource
    Articles et Livres
    décembre, 2014
    Angola, Algérie, Égypte, Bangladesh, Niger, Liechtenstein, Somalie, Namibie, Bulgarie, Bolivie, Ghana, Pakistan, Cap-Vert, Jordanie, Libéria, Libye, Viet Nam, République populaire démocratique de Corée, République-Unie de Tanzanie, Portugal, Cambodge, Éthiopie, Paraguay, Arabie saoudite, Liban, Slovénie, Burkina Faso, Slovaquie, Mauritanie, Croatie, Chili, Chine, Saint-Kitts-et-Nevis, Jamaïque, Djibouti, Guinée, Finlande, Uruguay, Thaïlande, Seychelles, Népal, Laos, Yémen, Philippines, Afrique du Sud, Kiribati, Ouganda, République arabe syrienne, Nicaragua, Kazakhstan, Nioué, Dominique, Bénin, Nigéria, Belgique, Togo, Zimbabwe, Sri Lanka, Royaume-Uni, Malawi, Costa Rica, Cameroun, Maroc, Lesotho, Tokélaou, Turkménistan, Trinité-et-Tobago, Pays-Bas, Iraq, Tchad, Géorgie, Monténégro, Mongolie, Îles Marshall, Belize, Afghanistan, Burundi, Bélarus, Grenade, Grèce, Andorre, Rwanda, Tadjikistan, Haïti, Mexique, Sainte-Lucie, Inde, Lettonie, Bhoutan, Saint-Vincent-et-les Grenadines, Malaisie, Norvège, République tchèque, Antigua-et-Barbuda, Fidji, Honduras, Maurice, République dominicaine, Luxembourg, Israël, Saint-Marin, Pérou, Indonésie, Vanuatu, Macédoine du Nord, Suriname, Congo, Islande, Îles Cook, Comores, Colombie, Botswana, Nauru, Moldova, Sao Tomé-et-Principe, Madagascar, Équateur, Sénégal, Maldives, Serbie, France, Lituanie, Mozambique, Zambie, Samoa, Saint-Siège, Guatemala, Danemark, Allemagne, Australie, Autriche, Venezuela, Iran, Palaos, Kenya, Turquie, Albanie, Oman, Tuvalu, Myanmar, Brunéi Darussalam, Tunisie, Fédération de Russie, Barbade, Brésil, Canada, Guinée équatoriale, États-Unis d'Amérique, Qatar, Suède, Ukraine, Guinée-Bissau, Eswatini, Tonga, Côte d'Ivoire, République de Corée, Guyana, Suisse, Chypre, Bosnie-Herzégovine, Singapour, Azerbaïdjan, Ouzbékistan, République centrafricaine, Pologne, Koweït, Gambie, Érythrée, Gabon, Estonie, Espagne, Îles Féroé, El Salvador, Mali, Irlande, Malte, Soudan du Sud, Sierra Leone, Panama, Bahamas, Îles Salomon, Nouvelle-Zélande, Monaco, Italie, République démocratique du Congo, Japon, Kirghizistan, Arménie, Micronésie, Émirats arabes unis, Argentine, Soudan, Bahreïn, Hongrie, Papouasie-Nouvelle-Guinée, Cuba, Amériques, Amérique septentrionale, Europe, Asie, Afrique, Global, Océanie

    Këto udhëzime janë instrumenti i parë i gjithanshëm botëror për të drejtat mbi burimet dhe administrimin e tyre që është përgatitur me negociata ndërqeveritare. Udhëzimet parashtrojnë parimet dhe standardet e pranuara botërisht të praktikave të përgjegjshme për përdorimin dhe mbajtjen në kontroll të tokës, burimeve të peshkimit dhe pyjeve.

  7. Library Resource
    Rapports et recherches
    décembre, 2014
    Slovénie, France, Bangladesh, Slovaquie, États-Unis d'Amérique, Mozambique, Chine, Indonésie, Australie, Canada, Guinée, Malawi, Nigéria, Rwanda, Philippines, Libye, Espagne, Inde, Fédération de Russie, Nouvelle-Zélande, Brésil

    The agricultural economics literature provides various estimates of the number of farms and small farms in the world. This paper is an effort to provide a more complete and up to date as well as carefully documented estimate of the total number of farms in the world, as well as by region and level of income. It uses data from numerous rounds of the World Census of Agriculture, the only dataset available which allows the user to gain a complete picture of the total number of farms globally and at the country level.

  8. Library Resource
    Rapports et recherches
    décembre, 2014
    France, Nigéria, États-Unis d'Amérique, Allemagne, Pérou, Royaume-Uni, Canada, Iran, République de Corée, Colombie, Nouvelle-Zélande, Maroc, Italie, Japon, Afrique du Sud, Cameroun, Argentine, Inde, Soudan, Chine, Mexique, Arabie saoudite

    Meeting Name: Intergovernmental Technical Panel on Soils
    Meeting symbol/code: ITPS-II/14/Report

Rechercher dans la bibliothèque foncière

Grâce à notre moteur de recherche robuste, vous pouvez rechercher n'importe quel document parmi les plus de 64 800 ressources hautement conservées dans la bibliothèque du foncier.

Si vous souhaitez avoir un aperçu de ce qui est possible, n'hésitez pas à consulter le guide de recherche.

 

Partagez cette page