Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 18.
  1. Library Resource
    Documents de politique et mémoires
    novembre, 2009
    Chine

    To assess the land use effects on soil micronutrients, this study examined the profile variation and storage of DTPA- extractable iron, manganese, copper and zinc at the depth of 0-150 cm of an aquic brown soil under four land use patterns, i.e. paddy, maize, and fallow fields and woodland, over 14 years in an ecological experimental station of northeastern China. Our results show that land use, soil depth, and their interactions significantly influenced micronutrient concentrations. Micronutrients concentrations decreased with soil depth.

  2. Library Resource
    Documents de politique et mémoires
    mars, 2009
    Inde, Brésil, Chine, États-Unis d'Amérique

    We quantify the emergence of biofuel markets and its impact on U.S. and world agriculture for the coming decade using the multi-market, multi-commodity international FAPRI (Food and Agricultural Policy Research Institute) model. The model incorporates the trade-offs between biofuel, feed, and food production and consumption and international feedback effects of the emergence through world commodity prices and trade.

  3. Library Resource
    Documents de politique et mémoires
    décembre, 2002
    Chine

    We examine the ongoing transition from centrally planned to market agriculture in rural China. In particular, we examine the devolution of land rights from village governments to villagers and the corresponding evolution of tenure security in agricultural land. We find econometric support for the statistical and economic importance of four explanations for local government behavior.

  4. Library Resource
    Documents de politique et mémoires
    décembre, 2008
    Chine

    We investigate conceptually and empirically the role of economic incentives in the primary land allocation in China in recent years. A theoretical analysis demonstrates how recent fiscal and governance reforms give rise to land conversion decisions and long run urban spatial sizes much like those generated by competitive land markets with private land ownership. An econometric investigation of Shanghai and the provinces surrounding it demonstrates the presence of rent gradients, often used as an indication of the presence of land markets.

  5. Library Resource
    Documents de politique et mémoires
    décembre, 2007
    Chine

    This Discussion Paper documents a survey conducted in rural China in 2005. A multi-topicsurvey funded by the Sino-German international Training Program "Sustainable Resource Usein North China", the project covers farm management, land property rights and rural creditaccess on the North China Plain.From a credit standpoint, this paper covers questionnaire design, sample, survey implementation,data entry, a brief assessment of the overall experience, as well as lessons drawn.

  6. Library Resource
    Documents de politique et mémoires
    octobre, 2009
    Chine

    Understanding farmer decisions on land use conversions (LUC) in rural areas has significant importance to understand and predict the patterns of land use changes in China. Many methods have been developed to search for the influencing factors on land use changes at farm household level. However, these methods have difficulty in evaluating the intertwined influences between factors and achieving farmer decision rules on LUC.

  7. Library Resource
    Documents de politique et mémoires
    juillet, 2010
    Chine

    Oasification and desertification are basic geographical processes in arid areas, and both change the soil properties and quality. Recently, oasification has been obvious in the southern rim of the Tarim Basin of Xinjiang, China, and agriculture is the main land-use type. In 2004, four experimental fields were established in the Cele Oasis, representing four typical land-use types of local farmers' tillage practices during oasification.

  8. Library Resource
    Documents de politique et mémoires
    octobre, 2008
    Chine

    Soil organic carbon (SOC) was measured in topsoil samples of agricultural soils from 311 locations of Jiutai County, Northeast China. The spatial characteristics of SOC were studied using the Geographic Information Systems and geostatistics. Effects of other soil physical and chemical properties, elevation, slope, soil type and land use type were explored. SOC concentrations followed a lognormal distribution, with a geometric mean of 1.50%. The experimental variogram of SOC was fitted with an exponential model.

  9. Library Resource
    Documents de politique et mémoires
    décembre, 2002
    Chine

    This paper uses household data from Northeast China to examine the link between investment and land tenure insecurity induced by China’'s system of village-level land reallocation. We quantify expropriation risk using a hazard analysis of individual plot tenures and incorporate the predicted “hazards of expropriation” into an empirical analysis of plot-level investment. Our focus is on organic

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