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共检索到34条 ,权限内显示50条;
Conservation-Practice Adoption Rates Vary Widely by Crop and Region
- 关键词：
- nitrogen
- 年份：
- 2015
- 摘要：
- This research analyzes national and regional adoption of no-till and strip-till ...
Targeting Investments To Cost Effectively Restore and Protect Wetland Ecosystems: Some Economic Insights
- 关键词：
- nitrogen removal
- 年份：
- 2015
- 摘要：
- The environmental benefits of restoring and preserving wetlands-including cleane ...
An Economic Assessment of Policy Options To Reduce Agricultural Pollutants in the Chesapeake Bay
- 关键词：
- phosphorus
- 年份：
- 2014
- 摘要：
- In 2010, a Total Maximum Daily Load (TMDL) was established for the Chesapeake Ba ...
Nitrogen Management on U.S. Corn Acres, 2001-10
- 关键词：
- nitrogen
- 年份：
- 2012
- 摘要：
- Nitrogen is a critical input in agriculture, enabling farmers to produc ...
Nitrogen in Agricultural Systems: Implications for Conservation Policy
- 关键词：
- Reactive nitrogen nitrogen management fertilizer water quality greenhouse gas economic incentives conservation policy regulation
- 年份：
- 2011
- 摘要：
- Nitrogen is an important agricultural input that is critical for crop p ...
The Role of Agriculture in Reducing Greenhouse Gas Emissions
- 关键词：
- agricultural economics climate change conservation greenhouse gas emissions carbon land methane mitigation agricultural practices
- 年份：
- 2010
- 摘要：
- the amount of nitrogen fertilizer applied to crops, changing livestock ...
Factors Contributing to the Recent Increase in U.S. Fertilizer Prices, 2002-08
- 关键词：
- phosphate
- 年份：
- 2009
- 摘要：
- of a number of domestic and global long- and shortrun supply and demand factors ...
Impact of Rising Natural Gas Prices on U.S. Ammonia Supply
- 关键词：
- nitrogen fertilizers
- 年份：
- 2007
- 摘要：
- The volatile and upward trend in U.S. natural gas prices from 2000-06 has led to ...
Managing Manure to Improve Air and Water Quality
- 关键词：
- nitrogen
- 年份：
- 2005
- 摘要：
- Animal waste from confined animal feeding operations is a potential source of ai ...
Technical Documentation of the Regional Manure Management Model for the Chesapeake Bay Watershed
- 关键词：
- nitrogen
- 年份：
- 2005
- 摘要：
- As part of a broader ERS assessment of the costs of manure management, a regiona ...
