150,804 research outputs found

    Impact of global warming on Chinese wheat productivity:

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    "Climate change continues to have major impact on crop productivity all over the world. While many researchers have evaluated the possible impact of global warming on crop yields using mainly indirect crop simulation models, there are relatively few direct assessments on the impact of observed climate change on past crop yield and growth. We use a 1979-2000 Chinese crop-specific panel dataset to investigate the climate impact on Chinese wheat yield growth. We find that a 1 percent increase in wheat growing season temperature reduces wheat yields by about 0.3 percent. This negative impact is less severe than those reported in other regions. Rising temperature over the past two decades accounts for a 2.4 percent decline in wheat yields in China while the majority of the wheat yield growth, 75 percent, comes from increased use of physical inputs. We emphasize the necessity of including such major influencing factors as physical inputs into the crop yield-climate function in order to have an accurate estimation of climate impact on crop yields." Authors' AbstractGlobal warming, Climate, Wheat production,

    Contribution of integrated farm management (IFM) to Defra objectives

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    A farming system comprises a complex of interrelated and interacting factors. Any study of an isolated part of the system will not provide adequate understanding of the behaviour of the entire system and interactions may be equally or more important than individual components. There is therefore a requirement for the development of integrated approaches and practices to help farming systems adapt to, eliminate or reduce the negative impacts of production on the environment. This must be achieved whilst maintaining the economic viability of the farm enterprise. Our analysis has confirmed that IFM techniques generally have far more beneficial than adverse effects on current Defra policy objectives. However, there are some notable ‘conflicts’ where a technique that has a large beneficial effect in one policy area has a large negative effect in another. Carbon footprinting is used to quantify the impact of some integrated farming practices

    The economic regulation of quality in the Italian VQPRD sector: which perspectives?

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    The Appellation of Origin system is aimed at reducing consumer's information costs, assuring a minimum quality standard and wine typicity, as well as maintaining a diversified supply in order to satisfy consumer s tastes heterogeneity. The effectiveness of the system is menaced by quantity and quality uncertainty, free riding phenomena, vertical relationships complexity and hold- up risks. The long term risk of the drop of the collective reputation of the Appellation justifies the economic regulation of the supply by the sectorial Organizations. Thus, it is necessary to evaluate ther role in the construction of the competitive advantage of the quality wine system. Then, the question that we address in this paper is that of the effectiveness of the supply regulation of quantity and quality in the Italian system of Appellation of Origin. We analyze the current context of the Italian Appellation of Origin Chianti Classico and the mechanisms of the supply economic regulation. At first, we describe the structural and commercial characteristics of the Appellation, the vertical relationships among the agents, the trend of the most important economic indicators of the Appellation. Then, we provide an analysis of the current mechanisms of the economic regulation of supply, from the specific production requirement s to the role of the sectorial organisation in the Appellation quality strategy. Finally, we point out the problems and the possible evolutions of the Appellation of Origin's system, in the context of the Reform of the CMO of wine.Appellation of Origin, collective reputation, economic regulation of supply, sectorial organizations, Agribusiness,

    Operational Excellence in Manufacturing, Service and the Oil & Gas: the Sectorial Definitional Constructs and Risk Management Implication

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    The current global business climate has not been favorable to most firms irrespective of industry affiliation. That condition necessitated companies to adopt operational excellence as a strategy for optimising output with little resources, reducing lead time with the efficient use of assets and employees and avoiding safety and health issues to people and the environment. As a result of the need for operational excellence, many kinds of literature defined the concept based on the context of industry or sector. Industries such as manufacturing, services, oil and gas, mining and so many industries to mention a few, have their unique construct in the definition and therefore causing dilemma on which dimension to hold on to. It is against this backdrop that this paper synthesizes and integrate all the varying dimensions and fuses out similarities, differences and the antecedence of research directions taken on the few mentioned sectors. The paper thus concludes that the unique construct among all the definitions is continuous improvement, cost reduction, quality, time utilization, operational efficiency, staff involvement and output optimisation. However, they varied on risk management, staff health, safety and the concern for the environment, which is unique to oil and gas industry and that can affect the choice of research variables

    Use of mixed methods designs in substance research: a methodological necessity in Nigeria

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    The utility of mixed methods (qualitative and quantitative) is becoming increasingly accepted in health sciences, but substance studies are yet to substantially benefit from such utilities. While there is a growing number of mixed methods alcohol articles concerning developed countries, developing nations are yet to embrace this method. In the Nigerian context, the importance of mixed methods research is yet to be acknowledged. This article therefore, draws on alcohol studies to argue that mixed methods designs will better equip scholars to understand, explore, describe and explain why alcohol consumption and its related problems are increasing in Nigeria. It argues that as motives for consuming alcohol in contemporary Nigeria are multiple, complex and evolving, mixed method approaches that provide multiple pathways for proffering solutions to problems should be embraced

    Reducing poverty through integrated management of groundwater and surface water

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    Groundwater management / Irrigation management / Domestic water / Poverty / Asia / India / Pakistan

    Plant Variety Protection in Africa – Towards Compliance with the TRIPS Agreement

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    International capital mobility in an era of globalisation: adding a political dimension to the 'Feldstein–Horioka Puzzle'

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    The debate about the scope of feasible policy-making in an era of globalisation continues to be set within the context of an assumption that national capital markets are now perfectly integrated at the international level. However, the empirical evidence on international capital mobility contradicts such an assumption. As a consequence, a significant puzzle remains. Why is it, in a world in which the observed pattern of capital flows is indicative of a far from globalised reality, that public policy continues to be constructed in line with more extreme variants of the globalisation hypothesis? I attempt to solve this puzzle by arguing that ideas about global capital market integration have an independent causal impact on political outcomes which extends beyond that which can be attributed to the extent of their actual integration

    Benchmarking for Fisheries Governance

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    The paper develops a benchmarking framework to improve fisheries governance and promote resilient ecosystems and profitable fisheries. The benchmarking includes five key components: accountability; transparency; incentives; risk assessment and management; and adaptability. Collectively, these factors provide a framework to benchmark and improve fisheries governance. Initial findings from benchmarking in two of Australia's Commonwealth fisheries indicate that the framework provides an important tool to help overcome the underlying causes of unsustainability in capture fisheries - poor and/or ineffective fisheries governance.fisheries, governance, sustainability
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