助手标题
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
共[2062]条 当前为第1条到20条[由于搜索限制,当前仅支持显示前5页数据]
 

相关语句
farming
Increased vegetation cover and change in farming techniques were suggested to prevent and control wind erosion of sand and soil.
      
The species composition and population densities of foraminifera were studied in scallop farming grounds in Alekseev Bight (Amurskii Bay, Sea of Japan).
      
When the scallop mariculture farm was in operation, the species composition of foraminifera in farming grounds was impoverished and their population densities were an order of magnitude lower than at more distant locations.
      
Between 1988 and 1995, after the liquidation of the farm, the species diversity and population density of foraminifera in farming grounds increased, while there was a general decline of the foraminifera population in the bay.
      
The contribution of the Yama population to the gene pool of the Ola chum salmon, (both by natural reproduction and by farming) is small in spite of many large-scale transplantations.
      
Changes in the properties and ecological functions of soils under the effect of farming are considered.
      
The dependence of the balance of melt water on the topography and type of farming lands on the slope is discussed.
      
The landscape-ecological principles of human economic activity proposed by Dokuchaev have developed into the modern methodology of agrolandscape design and adaptive-landscape farming.
      
Physical properties of chernozems on slopes in the landscape farming system
      
Changes in the physical status of soils on the slopes in the landscape farming system were studied.
      
A book on Moldavian chernozem and farming: A new type of popular scientific literature
      
A book on the problems of ecological farming on the chernozems of Moldova
      
Geobotanical investigations demonstrated that the transformation of the species composition of herbs from weeds to predominantly meadow plants occurred in five-ten years after the soil was no more used for farming.
      
Specific features of paleosols of burial mounds involved in current farming practices and their contemporary pedogenesis (using
      
Assessment of land quality and soil fertility for planning farming systems and agrotechnologies
      
The resulting situation can affect agricultural production by favoring the transition from high-input farming to grass farming in the southern Moscow region.
      
Widespread human activities, such as farming, deforestation, and dike construction, probably resulted in an increase in sediment discharge to the river-mouth area.
      
Other factors, such as fish farming, storm induced waves and mechanical destruction, and high water levels could be the perturbations during the system shifts, but these are not the key factors.
      
De-farming and ecological restoration in the loess hilly-gully region in northern China
      
De-farming has been a powerful measure taken by the central and local governments of China for ecological restoration in the loess hilly-gully region since 2000.
      
 

首页上一页12345下一页尾页 

 
CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社