搜索结果: 1-3 共查到“农业工程 the United States”相关记录3条 . 查询时间(0.031 秒)
美国农业部农业研究局（United States Department of Agriculture Agricultural Research Service）
美国农业部农业研究局 农业
2014/12/18
The Agricultural Research Service (ARS) is the U.S. Department of Agriculture's chief scientific in-house research agency. Our job is finding solutions to agricultural problems that affect Americans e...
基于美国保护性耕作分析的东北黑土区耕地保护（Tillage Soil Protection of Black Soil Zone in Northeast of China Based on Analysis of Conservation Tillage in the United States）
保护性耕作 东北黑土区 土壤侵蚀
2010/12/29
我国东北黑土区侵蚀严重，为找到控制水土流失的有效途径，分析了美国实施保护性耕作的实践经验，阐述了其发展概况、作用和实践中遇见的问题，具体介绍了美国保护性耕作中免耕（含条耕、带耕、垂直耕）、覆盖耕、垄耕等几种常见耕作模式和相关机具。对我国东北黑土区耕地保护途径的选择、保护性耕作的理解、耕作模式改革创新、秸秆还田、深松施肥和防治病虫草害具有借鉴意义。
Effect of food fortification on folic acid intake in the United States
Food fortification folic acid folate
2016/12/28
The addition of folic acid to all enriched cereal-grain foods, mandated by the Food and Drug Administration (FDA), was initiated in January 1998. Although this program was designed such that typical f...