Assessing the Spatial Distribution of Crop Production Using a Cross-Entropy Method

Assessing the Spatial Distribution of Crop Production Using a Cross-Entropy Method
Author: Liangzhi You and Stanley Wood
Publisher: Intl Food Policy Res Inst
Total Pages: 48
Release: 2012
Genre: Social Science
ISBN:

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.

International conference on impacts of agricultural research and development: why has impact assessment research not made more of a difference?

International conference on impacts of agricultural research and development: why has impact assessment research not made more of a difference?
Author: David J. Watson
Publisher: CIMMYT
Total Pages: 122
Release:
Genre: Agriculture
ISBN: 9706481044

Proceedings of a conference by the Standing Panel on Impact Assessment (SPIA) of the Interim Science Council, Consultative Group on International Agricultural Research (CGIAR) and the Economics Program, the International Maize and Wheat Improvement Center (CIMMYT), 4-7 February 2002, San José, Costa Rica.

Climate Change and Agriculture

Climate Change and Agriculture
Author: Robert O. Mendelsohn
Publisher: Edward Elgar Publishing
Total Pages: 255
Release: 2009-01-01
Genre: Technology & Engineering
ISBN: 1849802238

The specific focus of this seminal work is on the economic impact of climate change on agriculture world wide, and how faced with the resultant environmental alterations, agriculture might adapt under varied and varying conditions. Enhanced with a detailed and comprehensive index, Climate Change and Agriculture is highly recommended for academic library environmental studies and economic studies reference collections and supplemental reading lists. The Midwest Book Review Despite its great importance, there are surprisingly few economic studies of the impact of climate on agriculture and how agriculture can adapt under a variety of conditions. This book examines 22 countries across four continents, including both developed and developing economies. It provides both a good analytical basis for additional work and solid results for policy debate concerning income distributional effects such as abatement, adaptation, and equity. Agriculture and grazing are a central sector in the livelihood of many people, particularly in developing countries. This book uses the Ricardian method to examine the impact of climate change on agriculture. It also quantifies how farmers adapt to climate. The findings suggest that agriculture in developing countries is more sensitive to climate than agriculture in developed countries. Rain-fed cropland is generally more sensitive to warming than irrigated cropland and cropland is more sensitive than livestock. The adaptation to climate change results reveal that farmers make many adjustments including switching crops and livestock species, adopting irrigation, and moving between livestock and crops. The results also reveal that impacts and adaptations vary a great deal across landscapes, suggesting that adaptation policies must be location specific. Finally, the book suggests a research agenda for the future. Economists in academia and the public sector, policy analysts and development agencies will find this broad study illuminating.

The impact of disasters and crises on agriculture and food security: 2021

The impact of disasters and crises on agriculture and food security: 2021
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
Total Pages: 245
Release: 2021-03-17
Genre: Nature
ISBN: 9251340714

On top of a decade of exacerbated disaster loss, exceptional global heat, retreating ice and rising sea levels, humanity and our food security face a range of new and unprecedented hazards, such as megafires, extreme weather events, desert locust swarms of magnitudes previously unseen, and the COVID-19 pandemic. Agriculture underpins the livelihoods of over 2.5 billion people – most of them in low-income developing countries – and remains a key driver of development. At no other point in history has agriculture been faced with such an array of familiar and unfamiliar risks, interacting in a hyperconnected world and a precipitously changing landscape. And agriculture continues to absorb a disproportionate share of the damage and loss wrought by disasters. Their growing frequency and intensity, along with the systemic nature of risk, are upending people’s lives, devastating livelihoods, and jeopardizing our entire food system. This report makes a powerful case for investing in resilience and disaster risk reduction – especially data gathering and analysis for evidence informed action – to ensure agriculture’s crucial role in achieving the future we want.

Assessments of Regional and Global Environmental Risks

Assessments of Regional and Global Environmental Risks
Author: Alexander E. Farrell
Publisher: Routledge
Total Pages: 322
Release: 2010-09-30
Genre: Education
ISBN: 1136524177

As environmental challenges grow larger in scale and implications, it is increasingly important to apply the best scientific knowledge in the decisionmaking process. Editors Farrell and Jäger present environmental assessments as the bridge between the expert knowledge of scientists and engineers on the one hand and decisionmakers on the other. When done well, assessments have a positive impact on public policy, the strategic decisions of private firms, and, ultimately, the quality of life for many people. This book is the result of an international, interdisciplinary research project to analyze past environmental assessments and understand how their design influenced their effectiveness in bringing scientific evidence and insight into the decisionmaking process. The case studies in the book feature a wide range of regional and global risks, including ozone depletion, transboundary air pollution, and climate change. Assessments of Regional and Global Environmental Risks offers several important contributions. It provides a clear account of the choices faced in the design of environmental assessments and a clear description of the lessons learned from past assessments. It illustrates why assessments are social processes, not simply reports. And, while they identify no universal, one-size-fits-all design, the authors find that, to be effective, environmental assessments must be viewed by those who produce and use them as being salient; credible in their scientific support; and legitimate, or fair in design and execution.