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Showing items 1 through 9 of 18.-
Library ResourceDocuments de politique et mémoiresnovembre, 1996Chine
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Library ResourceDocuments de politique et mémoiresnovembre, 2009Chine
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.
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Library ResourceDocuments de politique et mémoiresmars, 2009Inde, 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.
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Library ResourceDocuments de politique et mémoiresdécembre, 2002Chine
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.
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Library ResourceDocuments de politique et mémoiresdécembre, 2008Chine
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.
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Library ResourceDocuments de politique et mémoiresdécembre, 2007Chine
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.
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Library ResourceDocuments de politique et mémoiresoctobre, 2009Chine
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.
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Library ResourceDocuments de politique et mémoiresjuillet, 2010Chine
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.
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Library ResourceDocuments de politique et mémoiresoctobre, 2008Chine
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.
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Library ResourceDocuments de politique et mémoiresdécembre, 2002Chine
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
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