Agriculture

Climate shocks leading to floods and droughts present high levels of uncertainty and difficulties in decision making for water district managers, agricultural producers, and policymakers throughout the world. This project focuses on the impacts of El Nino-Southern Oscillation (ENSO) events on precipitation and temperature variability, and in turn on water management and crop production, in one of China's major rice bowls, Jiangxi Province. Jiangxi is also one of China's poorest provinces, where swings in crop production and prices can jeopardize rural incomes and food security.

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Access to an adequate energy supply at reasonable cost is crucial for sustained economic growth. Unfortunately, oil prices and the need to import from politically unstable countries lowers the reliability of the US energy supply and hinders economic development. Although biofuels have been identified as an important component of the national strategy to decrease US dependence on foreign oil, the ability to sustain a rapid expansion of biofuel production capacity raises new research and policy issues. This document seeks to identify the most critical of these issues to help inform the policy development process. The goal is to enhance the long-term economic and environmental viability of the biofuel industry and its positive impact on agriculture, rural communities, and national security.

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Policy Briefs
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CAST Report
Authors
Kenneth Cassman
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In this report, we seek to meet the specific objectives of the first phase of China's study. The key goal of this study in China is to prepare evidence-based policy advice concerning the implications and opportunities for fruit producers during a period of a boom in horticulture demand and a restructuring of downstream markets and commercialization. Hence, the research in Phase 1 concentrates on identifying the determinants and consequences of restructuring of the horticulture sector in China. The analysis is conducted on three levels: macro (the policy issues and the national business environment), meso (the different chain segments and villages) and micro (household level). Because of space limitation and timing of the research the linkages between the first two levels are analysed in this report. The micro study will be carried out during the upcoming phase.

The research for this report is structured into two parts: a.) the national-meso level and b.) the local-meso level. In part 1 key policy issues, broad fruit supply chain issues and key stakeholders are identified. This part is intended to set the stage for the analysis done in part 2 and the forthcoming household study. The goal of part 1 is to analyze the evolution of China's restructured supply chain at a national level over a period of the past 10 or more years. With this background, the objective of part 2 is to study in more depth the restructuring changes that are occurring inside China's rural communities and within the markets. It also will provide context for the forthcoming micro-level study. In particular, we primarily study how marketing supply chains are operating and evolving within villages; inside wholesale markets and inside supermarkets.

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Policy Briefs
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Scott Rozelle
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The supermarket revolution has arrived in China and is spreading as fast as or faster than anywhere in the world. As the demand for vegetables, fruit, nuts and other high valued products has risen, urban retailers are handling increasingly more of these high value commodities. The experience of many developing countries suggests that there could be serious distributional impacts of the emergence of supermarkets. And, in China, as elsewhere in the world, there is concern among policy makers and academics that poor, small farmers might be excluded from the market for horticulture commodities.

The main goal of our paper is to understand what types of farmers have been able to participate in the horticultural revolution, how they interact with markets and how supply chains affect their production decisions and incomes. We also want to understand if (and if so, then how) the rise of supermarkets have changed supply chains. Our analysis uses spatially sampled data from 200 communities and 500 households in the Greater Beijing area and supplemented by data collected in Shandong Province, China's fruit and vegetable basket. In contrast to fears of some researchers, we find small and poor farmers have actively participate in the emergence of China's horticulture economy. Moreover, there has been almost no penetration of modern wholesalers or retailers into rural communities. We also conducted surveys and interviews in wholesale markets and with procurement agents in Beijing supermarket chains and document the fact that supply chain shifts have only affected the downstream segments of food markets and China's wholesale markets (midstream in the food supply chain) are only being affected marginally.

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Working Papers
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Scott Rozelle

Energy and Environment Building
473 Via Ortega
Stanford CA 94305

(650) 721-6207
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Professor, Earth System Science
Senior Fellow at the Freeman Spogli Institute for International Studies
Senior Fellow at the Stanford Woods Institute for the Environment
Senior Fellow at the Stanford Institute for Economic Policy Research (SIEPR)
Affiliate, Precourt Institute of Energy
shg_ff1a1284.jpg PhD

David Lobell is the Benjamin M. Page Professor at Stanford University in the Department of Earth System Science and the Gloria and Richard Kushel Director of the Center on Food Security and the Environment. He is also the William Wrigley Senior Fellow at the Stanford Woods Institute for the Environment, and a senior fellow at the Freeman Spogli Institute for International Studies (FSI) and the Stanford Institute for Economic Policy and Research (SIEPR).

Lobell's research focuses on agriculture and food security, specifically on generating and using unique datasets to study rural areas throughout the world. His early research focused on climate change risks and adaptations in cropping systems, and he served on the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report as lead author for the food chapter and core writing team member for the Summary for Policymakers. More recent work has developed new techniques to measure progress on sustainable development goals and study the impacts of climate-smart practices in agriculture. His work has been recognized with various awards, including the Macelwane Medal from the American Geophysical Union (2010), a Macarthur Fellowship (2013), the National Academy of Sciences Prize in Food and Agriculture Sciences (2022) and election to the National Academy of Sciences (2023).

Prior to his Stanford appointment, Lobell was a Lawrence Post-doctoral Fellow at Lawrence Livermore National Laboratory. He holds a PhD in Geological and Environmental Sciences from Stanford University and a Sc.B. in Applied Mathematics from Brown University.

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387 Plant Science Hall
Department of Agronomy and Horticulture
University of Nebraska-Lincoln
P. O. Box 830915
Lincoln, NE 68583-0915

(402) 472-5554 (402) 472-8650
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Professor of Agronomy and Horticulture, University of Nebraska
cassman_web_copy.jpg PhD

The need to meet food demand while protecting environmental quality and natural resources for future generations is a scientific challenge that has been grossly underestimated, and this theme provides a unifying framework for my research. Agricultural systems must ultimately contribute to solving the most pressing environmental problems facing humankind because agriculture is practiced on 33% of the earth's surface. Hence, the ultimate goal of my research and educational programs is to ensure that increases in food production do not compromise the quality of soil and water resources or threaten the ecological integrity of natural ecosystems. Current projects focus on understanding process controls on carbon sequestration in agricultural soils, energy efficiency of major rainfed and irrigated cropping systems in the north-central USA, the potential for ecological intensification of maize-based cropping systems, and use of crop simulation models to improve crop and soil management decisions. As a member of interdisciplinary research teams, our goal is to seek fundamental knowledge about the dynamic, interactive effects of climate and crop/soil management practices on short- and long-term performance of agroecosystems-with a focus on carbon sequestration, greenhouse gas emissions, nitrogen and energy efficiency, and crop productivity.

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Rosamond L. Naylor
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News
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This past autumn the Freeman Spogli Institute for International Studies (FSI) in conjunction with the Woods Institute for the Environment launched a program on Food Security and the Environment (FSE) to address the deficit in academia and, on a larger scale, the global dialogue surrounding the critical issues of food security, poverty, and environmental degradation.

"Hunger is the silent killer and moral outrage of our time; however, there are few university programs in the United States designed to study and solve the problem of global food insecurity," states program director Rosamond L. Naylor. "FSE's dual affiliation with FSI and the new Stanford Institute for the Environment position it well to make significant steps in this area."

Through a focused research portfolio and an interdisciplinary team of scholars led by Naylor and CESP (Center for Environmental Science and Policy) co-director Walter P. Falcon, FSE aims to design new approaches to solve these persistent and under-prioritized problems, expand higher education on food security and the environment at Stanford, and provide direct policy outreach.

Productive food systems and their environmental consequences are at the core of the program. While many of these systems are global in character, but they are influenced significantly by differing food objectives, income level, and instruments among nations. The program thus seeks to understand the food security issues that are of paramount interest to poor countries, the food diversification challenges that are a focus of middle-income nations, and the food safety and subsidy concerns prominent in richer nations.

Chronic hunger in a time of prosperity

Although the world's supply of basic foods has doubled over the past century, roughly 850 million people (12 percent of the world's population) suffer from chronic hunger. Food insecurity deaths during the past 20 years outnumber war deaths by a factor of at least 5 to 1. Food insecurity is particularly widespread in agricultural regions where resource scarcity and environmental degradation constrain productivity and income growth.

FSE is currently assessing the impacts of climate variability on food security in Asian rice economies. This ongoing project combines the expertise of atmospheric scientists, agricultural economists, and policy analysts to understand and mitigate the adverse effects of El Niño-related climate variability on rice production and food security under current and future global warming conditions. As a consequence of Falcon and Naylor's long-standing roles as policy advisors in Indonesia, models developed through this project have already been embedded into analytical units within Indonesia's Ministry of Agriculture, the Planning Ministry, and the Ministry of Finance.

"With such forecasts in hand, the relevant government agencies are much better equipped to mitigate the negative consequences of El Niño events on incomes and food security in the Indonesian countryside," explain Falcon and Naylor.

Food diversification and intensification

With rapid income growth, urbanization, and population growth in developing economies, priorities shift from food security to the diversification of agricultural production and consumption. "Meat production is projected to double by 2020" states Harold A. Mooney, CESP senior fellow and an author of the Millennium Ecosystem Assessment. "In China alone, meat consumption has more than doubled in the past generation." As a result, land once used to provide grains for humans now provides feed for hogs and poultry.

These trends will have major consequences on the global environment-affecting the quality of the atmosphere, water, and soil due to nutrient overloads; impacting marine fisheries both locally and globally through fish meal use; and threatening human health, as, for example, through excessive use of antibiotics.

An FSE project is looking at these trends as it relates to intensive livestock production and assessing the environmental impacts to gain a better understanding of the true costs of this resource-intensive system. A product of this work recently appeared as a Policy Forum piece in the December 9, 2005, issue of Science titled "Losing the Links Between Livestock and Land".

Numerous factors have contributed to the global growth of livestock systems, lead author Naylor notes, including declining feed-grain prices, relatively inexpensive transportation costs, and trade liberalization. "But many of the true costs remain largely unaccounted for," she says. Those costs include destruction of forests and grasslands to provide farmland for corn, soybeans, and other feed crops destined not directly for humans but for livestock; utilization of large quantities of freshwater; and nitrogen losses from croplands and animal manure.

Naylor and her research team are seeking better ways to track all costs of livestock production, especially the hidden ones related to ecosystem degradation and destruction. "What is needed is a re-coupling of crop and livestock systems," Naylor says. "If not physically, then through pricing and other policy mechanisms that reflect social costs of resource use and ecological abuse."

Such policies "should not significantly compromise the improving diets of developing countries, nor should they prohibit trade," Naylor adds. Instead, they should "focus on regulatory and incentive-based tools to encourage livestock and feed producers to internalize pollution costs, minimize nutrient run-off, and pay the true price of water."

Looking ahead

The future of the program on Food Security and the Environment looks bright, busy, and expansive. While a varied portfolio of projects is in line for the upcoming year, a strong emphasis remains in the area of food security. Building on existing research at Stanford, researchers are identifying avenues for enhancing orphan crop production in the world's least developed countries-crops with little international trade and investment, but with high local value in terms of food and nutrition security. The work seeks to identify advanced genetic and genomic strategies, along with natural resource management strategies, to improve orphan crop yields and stability, enhance crop diversity, and increase rural incomes through orphan crop production.

Another priority area of research centers on the development of biofuels. Biofuels are becoming increasingly a part of the policy set for world food and agriculture. As countries such as the United States seek energy self-reliance and look for alternatives to food and feed subsidies under WTO (World Trade Organization) rules, the conversion of corn, sugar, and soybeans to ethanol and other energy sources becomes more attractive. New extraction methods are making the technology more efficient, and crude oil prices at $60 per barrel are fundamentally changing the economics of biomass energy conversion. A large switch by key export food and feed suppliers, such as the United States and Brazil, to biofuels could fundamentally alter export prices, and hence the world food and feed situation. A team of FSE researchers will assess the true costs of these conversions.

The FSE program recently received a grant through the Presidential Fund for Innovation in International Studies to initiate new interdisciplinary research activities. One such project links ongoing research at Stanford on the environmental and resource costs of industrial livestock production and trade to assess the extent and rate of Brazil's rainforest destruction for soybean production. "Tens of millions of hectares of native grassland and rainforest are currently being cleared for soybean production to supply the global industrial livestock sector," says Naylor. A significant share of Brazil's soybeans is being shipped to China, where rapid income growth is fueling tremendous increases in meat consumption."

A team of remote-sensing experts, ecologists, agronomists, and economists will be looking at the ecological effects on the landscape through biogeochemical changes and biodiversity loss, the impacts of land clearing on the regional hydrologic cycle and climate change, the economic patterns of trade, and the role of policies to achieve an appropriate balance between agricultural commodity trade, production practices, and conservation in Brazil's rainforest states.

"I'm extremely pleased to see the rapid growth of FSE and am encouraged by the recent support provided through the Presidential Fund for Innovation in International Studies," states Naylor. "It enables the program to engage faculty members from economics, political science, biology, civil and environmental engineering, earth sciences, and medicine-as well as graduate students throughout the university-in a set of collaborative research activities that could significantly improve human well-being and the quality of the environment."

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This study employed aRicardian model to measure the impact of climate change on South Africa's field crops and analysed potential future impacts of further changes in the climate. A regression of farm net revenue on climate, soil and other socio-economic variables was conducted to capture farmer-adapted responses to climate variations. The analysis was based on agricultural data for seven field crops (maize, wheat, sorghum, sugarcane, groundnut, sunflower and soybean), climate and edaphic data across 300 districts in South Africa. Results indicate that production of field crops was sensitive to marginal changes in temperature as compared to changes in precipitation. Temperature rise positively affects net revenue whereas the effect of reduction in rainfall is negative. The study also highlights the importance of season and location in dealing with climatechange showing that the spatial distribution of climatechangeimpact and consequently needed adaptations will not be uniform across the different agro-ecological regions of South Africa. Results of simulations of climatechange scenarios indicate many impacts that would induce (or require) very distinct shifts in farming practices and patterns in different regions. Those include major shifts in crop calendars and growing seasons, switching between crops to the possibility of complete disappearance of some field crops from some region.

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Publication Type
Journal Articles
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Journal Publisher
Global and Planetary Change
Authors
Glwadys A. Gbetibouo
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