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| Rozelle, Scott; Deng, Xiangzheng; Huang, Jikun; Uchida, Emi. |
| In China, there is a growing debate on the role of cultivated land conversion on food security. This paper examines the changes of the area of cultivated land and its potential agricultural productivity in China using satellite images. We find that between 1986 and 2000, China recorded a net increase of cultivated land (+1.9%), which almost offset the decrease in average potential productivity, or bioproductivity (-2.2%). Therefore, we conclude that conversion of cultivated land did not hurt China's national food security. We also show that more recent change in cultivated area also should have little adverse effect on food security. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Land Economics/Use. |
| Ano: 2005 |
URL: http://purl.umn.edu/19323 |
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| Uchida, Emi; Anderson, Christopher M.; Swallow, Stephen K.. |
| Agriculture conventionally supplies food, fiber and fuel that consumers can purchase through the market. With the right incentives, farmers can also provide ecosystem services such as wildlife habitat, climate regulation, surface water flows and waste absorption and breakdown. Such incentives have so far come almost entirely from government-sponsored programs that rely on financial assistance to farmers to encourage them to alter agricultural practices or input mix to enhance ecosystem services. Programs recently implemented in Costa Rica and Columbia rely on payments by the beneficiaries of the ecosystem services, such as municipal water companies and water users (Pagiola et al. 2002). Few of these programs, however, have attempted to establish a market... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Land Economics/Use. |
| Ano: 2007 |
URL: http://purl.umn.edu/9955 |
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| Uchida, Emi; Xu, Jintao; Rozelle, Scott. |
| Since 1999, China has pursued one of the most ambitious conservation set-aside program's, known as Grain for Green. The overall goal of our paper is to analyze this program's cost-effectiveness and sustainability. We find that while the program has made a clear attempt to retire land that has the highest potential of contributing to soil erosion, cost-effectiveness can be improved by targeting plots with highest environmental benefits and allowing payments to reflect heterogeneous opportunity costs. We also find indications that preventing farmers from reconverting plots to cultivation will be critical to sustain environmental benefits of the program. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural and Food Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/22252 |
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