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Author : Stanley Wood, Liangzhi You, and Xiaobo Zhang
Publisher : Intl Food Policy Res Inst
Page : 42 pages
File Size : 44,6 Mb
Release : 2024-07-02
Category : Social Science
ISBN : 8210379456XXX
Author : Liangzhi You and Stanley Wood
Publisher : Intl Food Policy Res Inst
Page : 48 pages
File Size : 42,6 Mb
Release : 2012
Category : Social Science
ISBN : 8210379456XXX
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 characteristics, satellite-derived land cover data, biophysical crop suitability assessments, and population density. An application is presented in which Brazilian state level production statistics are used to generate pixel level crop production data for eight crops. To validate the spatial allocation we aggregated the pixel estimates to obtain synthetic estimates of municipio level production in Brazil, and compared those estimates with actual municipio statistics. The approach produced extremely promising results. We then examined the robustness of these results compared to short-cut approaches to spatializing crop production statistics and showed that, while computationally intensive, the cross-entropy method does provide more reliable estimates of crop production patterns.
Author : Liangzhi You
Publisher : Intl Food Policy Res Inst
Page : 32 pages
File Size : 47,7 Mb
Release : 2008
Category : Social Science
ISBN : 8210379456XXX
Author : Ephraim Nkonya, John Pender, Crammer Kaizzi, Kato Edward, and Samuel Mugarura
Publisher : Intl Food Policy Res Inst
Page : 124 pages
File Size : 41,9 Mb
Release : 2024-07-02
Category : Social Science
ISBN : 8210379456XXX
Author : Salvatore Di Falco, Jean-Paul Chavas, and Melinda Smale
Publisher : Intl Food Policy Res Inst
Page : 47 pages
File Size : 44,5 Mb
Release : 2024-07-02
Category : Social Science
ISBN : 8210379456XXX
Author : J. Scott Angle and Nicholas A. Linacre
Publisher : Intl Food Policy Res Inst
Page : 42 pages
File Size : 46,8 Mb
Release : 2005
Category : Social Science
ISBN : 8210379456XXX
Author : Latha Nagarajan and Melinda Smale
Publisher : Intl Food Policy Res Inst
Page : 74 pages
File Size : 40,6 Mb
Release : 2024-07-02
Category : Social Science
ISBN : 8210379456XXX
Author : Liangzhi You, Mark W. Rosegrant, Cheng Fang, and Stanley Wood
Publisher : Intl Food Policy Res Inst
Page : 30 pages
File Size : 48,8 Mb
Release : 2024-07-02
Category : Social Science
ISBN : 8210379456XXX
Author : Melinda Smale, Patricia Zambrano, José Falck-Zepeda, and Guillaume Gruère
Publisher : Intl Food Policy Res Inst
Page : 102 pages
File Size : 49,6 Mb
Release : 2024-07-02
Category : Social Science
ISBN : 8210379456XXX
Author : Latha Nagarajan, Philip G. Pardey, and Melinda Smale
Publisher : Intl Food Policy Res Inst
Page : 68 pages
File Size : 44,5 Mb
Release : 2024-07-02
Category : Social Science
ISBN : 8210379456XXX
Author : Regina Birner, Kristin Davis, John Pender, Ephraim Nkonya, Ponniah Anandajayasekeram, Javier Ekboir, Adiel Mbabu, David J. Spielman, Daniela Horna, Samuel Benin, and Marc Cohen
Publisher : Intl Food Policy Res Inst
Page : 121 pages
File Size : 48,8 Mb
Release : 2024-07-02
Category : Social Science
ISBN : 8210379456XXX
Author : Nicholas A. Linacre, Mark A. Burgman, Peter K. Ades, and Allen Stewart-Oaten
Publisher : Intl Food Policy Res Inst
Page : 37 pages
File Size : 45,6 Mb
Release : 2024-07-02
Category : Social Science
ISBN : 8210379456XXX
Author : Nicholas A. Linacre and Joel I. Cohen
Publisher : Intl Food Policy Res Inst
Page : 42 pages
File Size : 46,7 Mb
Release : 2024-07-02
Category : Social Science
ISBN : 8210379456XXX
Author : Keith Daniel Wiebe
Publisher : Edward Elgar Publishing
Page : 478 pages
File Size : 48,7 Mb
Release : 2003-01-01
Category : Technology & Engineering
ISBN : 1781956979
'Action is needed to fight poverty by sustaining the environment and the use of natural resources. Land Quality, Agricultural Productivity, and Food Security explores a range of factors driving food security. The book offers an assessment to link quality of the available land resources with productivity of land and the ability to ensure food security. It offers a mixture of broad-scale assessments across the globe, with detailed case studies, deepening our understanding of economics and decision-making mechanisms. It is recommended to researchers, as well as actors in the private and public domain, who are keen to improve their understanding of the appropriate actions that ensure food security in the decade to come.' - Floor Brouwer, Agricultural Economics Research Institute (LEI), The Hague, The Netherlands Land quality and land degradation affect agricultural productivity and food security, but quantifying these relationships has been difficult. Data are extremely limited and outcomes are sensitive to the choices that farmers make. The contributors to this book - including soil scientists, geographers, and economists - analyse data on soils, climate, land cover, agricultural inputs and outputs, and a variety of socio-economic factors to provide new insights into three key issues: * the extent to which differences in land quality generate differences in agricultural productivity across countries * how farmers' responses to differences or changes in land quality are influenced by economic, environmental, and institutional factors, and * whether land degradation over time threatens productivity growth and food security at local, regional, and global levels.
Author : Paul J. Block, Kenneth Strzepek, Mark Rosegrant, and Xinshen Diao. May
Publisher : Intl Food Policy Res Inst
Page : 55 pages
File Size : 44,8 Mb
Release : 2024-07-02
Category : Social Science
ISBN : 8210379456XXX