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EL EFECTO DE LOS PAGOS DIRECTOS DE LOS PASES MIEMBROS DE LA ORGANIZACIN DE COOPERACIN Y DESARROLLO ECONMICOS (OCDE) EN LOS MERCADOS AGRCOLAS MUNDIALES. EVIDENCIA A PARTIR DE LOS MODELOS DE EQUILIBRIO GENERAL Y PARCIAL










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    This paper examines the effects of trade and domestic agricultural policy reforms on the distribution of incomes in six developing countries: Brazil, China, India, Malawi, Mexico and South Africa. The aggregate results from a global trade model are fed into separate national models. The insights available from alternative model types are evaluated. The distributional impacts of reform are found to be complex and to vary between countries. Given that it is typically impossible to reform (or equal ly not reform) without hurting some households with lower incomes, the conclusion is that it makes sense to help these households with targeted policies.
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    Efectos de la liberalización del comercio en el mercado mundial del azúcar 1999
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    El presente informe tiene el propósito de presentar y examinar los resultados de un estudio sobre la libe-ralización del comercio en el mercado mundial del azúcar. El estudio considera las siguientes hipóte-sis: a) los efectos de la liberalización del comercio derivados del Acuerdo de la Ronda Uruguay (ARU); b) los efectos de la liberalización total del comercio mundial; c) los efectos de la liberalización parcial del comercio; d) los efectos de la liberalización total del comercio en los países industrializados; e) los efectos de la liberalización parcial del comercio en los países industrializados; f) los efectos de la liberalización total del comercio en los principales países en desarrollo (el Brasil, China, Indonesia y la República de Corea); y g) los efectos de la liberalización parcial del comercio en los principales países en desarrollo. El análisis se ha centrado en los cambios en el precio mundial del azúcar y en los relacionados con la producción, el consumo, las variaciones en las existencias y el comercio neto de 42 países y/o regiones: Estados Unidos de América, Canadá, Comunidad Europea (CE), otros países de Europa occidental, Polonia, otros países de Europa oriental, ex URSS, Japón, Australia, Nueva Zelandia, Fiji, otros países de Oceanía, China, India, Indonesia, Filipinas, Tailandia, Malasia, Pakistán, Viet Nam, Corea, Bangladesh, otros países de Asia, Cuba, Guatemala, México, Argentina, Brasil, Chile, otros países de América Latina, Sudáfrica, Kenya, Zimbab we, Argelia, Malawi, Tanzanía, Egipto, Mauricio, otros países de África, Turquía, Arabia Saudita y otros países del Cercano Oriente.
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    These country reports are prepared as a contribution to the FAO publication, The State of the World’s Biodiversity for Food and Agriculture. The preparation of Country Reports provided an overview of existing information gaps and helped to establish a baseline information on biodiversity for food and agriculture. They also provided information on the role of biodiversity for food and agriculture in the provision of multiple ecosystem services. These country reports helped to address the following questions: • What is the state of the conservation and use of biodiversity for food security and nutrition, ecosystem services and sustainability? • What trends can be identified in the conservation and use of biodiversity for food and agriculture and in the effects of major drivers of change? • How can conservation and use of biodiversity for food and agriculture be improved and the contributions of biodiversity to food security and nutrition, ecosystem services, sustainability and the improvement of livelihoods of farmers, pastoralists, forest dwellers and fisher folk be enhanced?
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    《青年与联合国全球联盟学习和行动系列:青少年海洋科普手册》是为学校、青年团体和其他好奇的年轻学习者提供的教育资源,探索从海岸带到冰冻极点,从深海到公海的海洋。它仔细探讨了塑造水下和潮间带动植物生命的物理特征和自然过程。它还展示了海洋带给我们的诸多好处,讨论了我们对海洋带来的负面影响,并解释了好的管理如何保护和养护海洋及海洋生命。在手册的最后,提供了一些鼓舞人心的青年人领导倡议的例子,并给出了容易遵循的动作计划来帮助你发展自己的海洋养护行动和项目。
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    Standard operating procedure for soil pH determination 2021
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    Soils are referred to as being acid, neutral, or alkaline, depending on their pH, with 7 being neutral, below 7 acidic and above 7 alkaline. The pH range normally found in soils varies from 3 to 9. As pH is measured in terms of hydrogen ion activity, pH is thus a measure of only the intensity of H+ activity and not the amount of acidity present. The desirable soil pH range for optimum plant growth varies among crops. Generally, a soil pH between 6.0-7.5 is acceptable for most plants, as most nutrients are available in this pH range. However, some plants have soil pH requirements above or below this range. An acidic pH may cause higher mobility of toxic elements potentially leaching into ground water or taken up and accumulated in plants. Additionally, inhibited plant growth may be observed in low pH soils due to aluminum toxicity. In higher pH soils, phosphorus and most micronutrients may become less available. As the pH value of many soils correlates with base saturation, it may also be used in the field for preliminary classification purposes.