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Registros recuperados: 17 | |
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You, Liangzhi; Wood, Stanley; Wood-Sichra, Ulrike. |
In order to evaluate food security, technology potential and the environmental impacts of production in a strategic and regional context, it is critical to have reliable information on the spatial distribution and coincidence of people, agricultural production, and environmental services. This paper proposes a spatial allocation model for generating highly disaggregated, crop-specific production data by a triangulation of any and all relevant background and partial information. This includes national or sub-national crop production statistics, satellite data on land cover, maps of irrigated areas, biophysical crop suitability assessments, population density, secondary data on irrigation and rainfed production systems, cropping intensity, and crop prices.... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Global; Cross entropy; Satellite image; Spatial allocation; Agricultural production; Crop suitability; Crop Production/Industries; C6; Q15; Q24. |
Ano: 2006 |
URL: http://purl.umn.edu/25737 |
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You, Liangzhi; Ringler, Claudia; Nelson, Gerald C.; Wood-Sichra, Ulrike; Robertson, Richard D.; Wood, Stanley; Guo, Zhe; Zhu, Tingju; Sun, Yan. |
Although irrigation in Africa has the potential to boost agricultural productivities by at least 50 percent, food production on the continent is almost entirely rainfed. The area equipped for irrigation, currently slightly more than 13 million hectares, makes up just 6 percent of the total cultivated area. Eighty-five percent of Africa’s poor live in rural areas and mostly depend on agriculture for their livelihoods. As a result, agricultural development is key to ending poverty on the continent. Many development organizations have recently proposed to significantly increase investments in irrigation in the region. However, the potential for irrigation investments in Africa is highly dependent upon geographic, hydrologic, agronomic, and economic factors... |
Tipo: Working or Discussion Paper |
Palavras-chave: Irrigation potential; Internal rate of return; Large-scale irrigation; Small-scale irrigation; Investment; Africa; International Development; Resource /Energy Economics and Policy. |
Ano: 2010 |
URL: http://purl.umn.edu/93736 |
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Pardey, Philip G.; Beintema, Nienke M.; Dehmer, Steven; Wood, Stanley. |
Sustained, well-targeted, and effectively used investments in R&D have reaped handsome rewards from improved agricultural productivity and cheaper, higher quality foods and fibers. As we begin a new millennium, the global patterns of investments in agricultural R&D are changing in ways that may have profound consequences for the structure of agriculture worldwide and the ability of poor people in poor counties to feed themselves. This report documents and discusses these changing investment patterns, highlighting developments in the public and private sectors. It revises and carries forward to 2000 data that were previously reported in the 2001 IFPRI Food Policy Report Slow Magic: Agricultural R&D a Century After Mendel. Some past trends are... |
Tipo: Report |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
Ano: 2006 |
URL: http://purl.umn.edu/55647 |
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Gehlhar, Clemen G.; Nagarajan, Latha; Wood, Stanley. |
Agricultural research managers and scientists are under increasing pressure to demonstrate the efficient and socially-effective use of funds spent on agricultural R&D. These pressures stem from heightened expectations of transparency and accountability in the use of public funds, as well as from the growing demand for evidence of impact on target social groups and environmental services. Finally, advances in agricultural biotechnology research and the ensuing dialogue about the desirability of using biotechnology tools for increasing food production in developing countries have highlighted the need to assess the impacts of international agricultural research in the US, the developing countries, and the international agricultural research centers... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
Ano: 2002 |
URL: http://purl.umn.edu/19625 |
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Wood, Stanley; Sebastian, Kate; Nachtergaele, Freddy; Nielsen, Daniel; Dai, Aiguo. |
Two increasingly shared perspectives within the international development community are that (a) geography matters, and (b) many government interventions would be more successful if they were better targeted. This paper unites these two notions by exploring the opportunities for, and benefits of, bringing an explicitly spatial dimension to the tasks of formulating and evaluating agricultural development strategies. The paper was originally conceived to address the more specific goal of proposing a spatial characterization to underpin deliberations on appropriate development strategies for the “fragile” or “less-favored” lands of Sub-Saharan Africa. In practice, however, we considered that goal to be not only impractical but, perhaps, ill-conceived. The... |
Tipo: Working or Discussion Paper |
Palavras-chave: International Development. |
Ano: 1999 |
URL: http://purl.umn.edu/42830 |
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You, Liangzhi; Wood, Stanley; Wood-Sichra, Ulrike. |
In order to evaluate food security, technology potential and the environmental impacts of production in a strategic and regional context, it is critical to have reliable information on the spatial distribution and coincidence of people, agricultural production, and environmental services. This paper proposes a spatial allocation model for generating highly disaggregated, crop-specific production data by a triangulation of any and all relevant background and partial information. This includes national or sub-national crop production statistics, satellite data on land cover, maps of irrigated areas, biophysical crop suitability assessments, population density, secondary data on irrigation and rainfed production systems, cropping intensity, and crop prices.... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Research Methods/ Statistical Methods. |
Ano: 2006 |
URL: http://purl.umn.edu/21299 |
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Omamo, Steven Were; Diao, Xinshen; Wood, Stanley; Chamberlin, Jordan; You, Liangzhi; Benin, Samuel; Wood-Sichra, Ulrike; Tatwangire, Alex. |
In countries that are heavily dependent on agriculture for employment and income, underperformance is not only untenable but also potentially explosive. This is the case in the countries of eastern and central Africa—Burundi, Democratic Republic of Congo, Eritrea, Ethiopia, Kenya, Madagascar, Rwanda, Sudan, Tanzania, and Uganda—where tens of millions of people face ongoing poverty, hunger, and malnutrition. This report, the result of a two-year collaboration between the International Food Policy Research Institute and the Association for Strengthening Agricultural Research in Eastern and Central Africa, identifies how eastern and central African countries can stimulate agricultural growth to address these dire circumstances. The findings suggest that... |
Tipo: Report |
Palavras-chave: Agriculture; Economic aspects; Africa; Eastern; Central; Agricultural development projects; International Development. |
Ano: 2006 |
URL: http://purl.umn.edu/37881 |
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Wood, Stanley; You, Liangzhi; Zhang, Xiaobo. |
From a theoretical perspective crop yields should tend to converge over time and space as: growth in yield potential exhibits diminishing returns; an increasing share of farmers shift to using high yielding varieties (HYVs); barriers to the free flow of knowledge and information are removed; and significant investments continue to be made in supporting institutions whose mandates include facilitating and accelerating the cross-border flow of improved agricultural technologies. Using a new, sub-national crop yield database for Latin America and the Caribbean (LAC) we examine whether convergence is indeed occurring, and discover it is not. On the contrary, there is evidence of divergence. We test three hypotheses that might help account for this finding:... |
Tipo: Working or Discussion Paper |
Palavras-chave: Crop yields; Maize; Rice; Soybeans; Latin America; Caribbean; South America; Crop Production/Industries. |
Ano: 2004 |
URL: http://purl.umn.edu/60322 |
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Johnson, Michael; Resnick, Danielle; Bolwig, Simon; Chamberlin, Jordan; You, Liangzhi; Wood, Stanley; Hazell, Peter B.R.. |
While greater growth in agriculture and the broader rural sector is crucial for ameliorating Africa's high levels of poverty and malnutrition, developing strategies to achieve these objectives is hindered by a number of factors, including the broad array of interventions needed, the lack of accurate data, and dearth of trained local policy analysts. As such, this paper proposes a Strategic Analysis Knowledge Support System (SAKSS) in which data, tools, and knowledge are compiled, analyzed, and disseminated for the purposes of identifying a set of priority investment and policy options to promote agricultural growth and rural development. These analyses can in turn help inform the broader process of designing, implementing, and monitoring and evaluating a... |
Tipo: Working or Discussion Paper |
Palavras-chave: Agricultural growth; Strategic analysis; Sub-Saharan Africa; Community/Rural/Urban Development. |
Ano: 2004 |
URL: http://purl.umn.edu/60184 |
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You, Liangzhi; Wood, Stanley. |
While agricultural production statistics are reported on a geopolitical – often national - basis we often need to know the status of production or productivity within specific sub-regions, watersheds, or agro-ecological zones. Such re-aggregations are typically made using expert judgments or simple area-weighting rules. We describe a new, entropy-based approach to making spatially disaggregated assessments of the distribution of crop production. Using this approach tabular crop production statistics are blended judiciously with an array of other secondary data to assess the production of specific crops within individual ‘pixels’ – typically 25 to 100 square kilometers in size. The information utilized includes crop production statistics, farming system... |
Tipo: Working or Discussion Paper |
Palavras-chave: Entropy; Cross entropy; Remote sensing; Spatial allocation; Production; Crop distribution; Crop Production/Industries. |
Ano: 2004 |
URL: http://purl.umn.edu/60324 |
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Registros recuperados: 17 | |
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