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共检索到16条 ,权限内显示50条;
Adoption of Agricultural Production Practices: Lessons Learned from the U.S. Department of Agriculture Area Studies Project
- 年份：
- 2001
- 摘要：
- nitrogen applications, green manure, biological pest controls, pest-resistant v ...
Characteristics of U.S. Wheat Farming: A Snapshot
- 关键词：
- Wheat input use production practices farm characteristics farm size costs and returns regression low-cost farms high-cost farms cumulative distribution
- 年份：
- 2000
- 摘要：
- g to the findings of a 1994 survey conducted by the U.S. Department of Agricultu ...
Green Technologies for a More Sustainable Agriculture
- 关键词：
- Sustainable agriculture natural capital nonrenewable resources renewable resources environmental services green technology integrated pest management conservation tillage enhanced nutrient management precision agriculture
- 年份：
- 1999
- 摘要：
- r development. In addition, simply making a technology available does not mean i ...
The Food and Fiber System: Contributing to the U.S. and World Economies
- 关键词：
- farming
- 年份：
- 1998
- 摘要：
- Even though farming accounts for only about 1 percent of the total nati ...
The Revised ERS County Typology: An Overview
- 关键词：
- farming
- 年份：
- 1994
- 摘要：
- America. Classifies nonmetro counties into one of six types: farming-d ...
The Diverse Social and Economic Structure of Nonmetropolitan America
- 关键词：
- farming
- 年份：
- 1985
- 摘要：
- : (1) counties depending heavily on farming, (2) counties depending hea ...
