农学 >>> 农学总论 作物学 园艺学 土壤学 植物保护学 农药学 林学 畜牧学 兽医学 水产学
搜索结果: 1-15 共查到农学 USA相关记录16条 . 查询时间(0.061 秒)
Poplar remediation systems are ideal for reducing runoff, cleaning groundwater, and delivering ecosystem services to the North American Great Lakes and globally. We used phyto-recurrent selection (PRS...
Research Highlights: This paper integrates disparate research results pertaining to climate change impacts to 12 co-occurring forest tree species and their climatypes such that management options for ...
Silvopasture is the deliberate integration of trees, forage, and grazing livestock on the same piece of land. These agroecosystems are intensively managed for multiple benefits, providing both short-a...
美国荷斯坦奶牛协会(Holstein Association USA)(图)     美国荷斯坦奶牛协会  乳品  繁殖       font style='font-size:12px;'> 2017/3/8
Holstein Association USA is the world's largest dairy breed organization, composed of members who have an interest in breeding, raising and milking Holstein cattle. Headquartered in Brattleboro, Vermo...
Since its formation, the Holstein Association has been dedicated to the development of the Holstein breed. Today, Holstein cattle dominate the U.S. dairy industry due to unexcelled production, greater...
Portugal's seaport communities are undergoing substantial change. Once protected by the nation's closed economy and restrictions to cultural adaptation, they are now required to face increased competi...
Portugal's seaport communities are undergoing substantial change. Once protected by the nation's closed economy and restrictions to cultural adaptation, they are now required to face increased competi...
Preservation of forage crops as silage offers opportunity to avoid the high risk of rain-damaged hay in the humid south-central USA. Recent developments with baled silage or baleage make silage a less...
Tamarisk (a.k.a. saltcedar, Tamarix spp.) is an invasive plant species that occurs throughout western riparian and wetland ecosystems. It is implicated in alterations of ecosystem structure and functi...
Fossil fuel burning and deforestation have driven dramatic increases in atmospheric CO2 since the industrial revolution. However, forests in the northern temperate region sequester a substantial (~0.6...
Soil microbial community structure is clearly linked to current plant species composition, but less is known about the legacy effects of plant species and agricultural management practices on soil mic...
Pork producers selected from the National Pork Board’s producer database were surveyed. Five (3.7%) reported being diagnosed with a MRSA infection. Risk factors related to swine farm biosecurity were ...
Sowing date effect on grain soybean has been well documented, while less research was done on vegetable soybean. The impact of sowing date on the duration of critical phonological stages, and the resp...
Cemented subsurface layers restrict root growth in many southeastern USA Coastal Plain soils. Though cementa- tion is usually reduced by tillage, soil amendments can offer a more permanent solution if...
The Forest and Rangeland Ecosystem Science Center(USA)     Ecosystem Science  生态系统  Forest  森林       font style='font-size:12px;'> 2007/12/26
The Forest and Rangeland Ecosystem Science Center (FRESC) provides scientific understanding and the technology needed to support sound management and conservation of our nation’s natural resources, wi...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...