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热门报告
共检索到36条 ,权限内显示50条;
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 management and identifies issues affecting their potential performance ...
Grassland to Cropland Conversion in the Northern Plains: The Role of Crop Insurance, Commodity, and Disaster Programs
- 关键词：
- cropland
- 年份：
- 2011
- 摘要：
- e grasslands being converted to cropland in the United States and espec ...
Manure Use for Fertilizer and for Energy: Report to Congress
- 关键词：
- Manure fertilizer fertilizer nutrients energy corn dairy hogs Agricultural Resource Management Survey (ARMS)
- 年份：
- 2009
- 摘要：
- of fertilizer, and its other uses. About 5 percent of all U.S. cropland...
Commodity Payments, Farm Business Survival, and Farm Size Growth
- 关键词：
- cropland
- 年份：
- 2007
- 摘要：
- In the last 25 years, U.S. crop farms have steadily declined in number and grown ...
Major Uses of Land in the United States, 2002
- 关键词：
- agricultural land
- 年份：
- 2006
- 摘要：
- .8 percent); grassland pasture and range land, 587 million acres (25.9 percent); ...
Possible Implications for U.S. Agriculture From Adoption of Select Dietary Guidelines
- 关键词：
- Agriculture dairy Dietary Guidelines for Americans dietary recommendations food food consumption food production Food Guidance System fruit MyPyramid
- 年份：
- 2006
- 摘要：
- U.S. cropland in 2002. To meet the dairy guidelines, consumption of mi ...
Environmental Effects of Agricultural Land-Use Change: The Role of Economics and Policy
- 关键词：
- Conservation Reserve Program (CRP) crop insurance erosion extensive margin farm policy imperiled species land use land-use change land quality nutrient loss
- 年份：
- 2006
- 摘要：
- of environmental sensitivity. If cropland that shifts in and out of pr ...
Trends in U.S. Tobacco Farming
- 年份：
- 2004
- 摘要：
- with 9.0 acres in 1997. Tobacco farms averaged only 62 acres of harvested c ...
Environmental Compliance in U.S. Agricultural Policy: Past Performance and Future Potential
- 关键词：
- conservation compliance Sodbuster Swampbuster conservation policy agri-environmental policy nutrient management buffer practices
- 年份：
- 2004
- 摘要：
- Since 1985, U.S. agricultural producers have been required to practice soil cons ...
Soil, Nutrient, and Water Management Systems Used in U.S. Corn Production
- 关键词：
- ARMS soil management nutrient management irrigation systems profitability socioeconomic variables
- 年份：
- 2002
- 摘要：
- Corn production uses over 25 percent of the Nation's cropland and more ...
