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共检索到4条 ,权限内显示50条;
Agricultural Productivity Growth in the United States: Measurement, Trends, and Drivers
- 关键词：
- land productivity
- 年份：
- 2015
- 摘要：
- Since 1948, U.S. agricultural output has more than doubled, with an average grow ...
Targeting Investments To Cost Effectively Restore and Protect Wetland Ecosystems: Some Economic Insights
- 关键词：
- Wetland valuation wetland costs wetland benefits ecosystem services environmental targeting nonmarket values wetland amenities cost-effective conservation duck hunting nitrogen removal
- 年份：
- 2015
- 摘要：
- -as well as costs, depend on wetland type, land productivity, and the p ...
Economic Measures of Soil Conservation Benefits: Regional Values for Policy Assessment
- 关键词：
- soil productivity
- 年份：
- 2008
- 摘要：
- This report describes data and methodologies that the Economic Research Service ...
Environmental Effects of Agricultural Land-Use Change: The Role of Economics and Policy
- 关键词：
- soil productivity
- 年份：
- 2006
- 摘要：
- This report examines evidence on the relationship between agricultural land-use ...
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