英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • The State of Food and Agriculture 2020
    The annual amount of available freshwater resources per person has declined by more than 20 percent in the past two decades This is a particularly serious issue in Northern Africa and Western Asia, where per capita freshwater has declined by more than 30 percent and where the average annual volume of water per person barely reaches 1 000 m3, which is conventionally considered the threshold
  • Aquifer depletion exacerbates agricultural drought losses in . . .
    Aquifer depletion poses a major threat to the ability of farmers, food supply chains and rural economies globally to use groundwater as a means of adapting to climate variability and change
  • Chapter 10: Farming: Conventional and Sustainable Practices
    Every year, about 3 million hectares of cropland are made unusable by this process, which takes soil away from the surface via wind and water Erosion The conversion of productive land to desert, and the blowing of sand out of drylands and deserts to other places, is defined as _____
  • Water Crisis in Pakistan: Manifestation, Causes and the Way . . .
    The Indus Basin aquifer has been ranked as the 2nd most over-stressed underground water reserve in the world [12] The strain on groundwater is very disturbing Over 60 percent of irrigation, 70 percent of drinking water and 100 percent of the industry in the country depend on it [13] 2 6 Drinking Water
  • Powering agriculture: Present status, future potential, and . . .
    Irrigated agriculture plays a significant role in superior crop quality, such as increases in the crop's fresh mass with irrigation The demand for irrigation water for sustainable agriculture has been recently increasing The solar-powered pumping system for cultivation in developing countries could be a promising way of watering crops
  • Water Q A: How important is groundwater? - USGS. gov
    In 2015, about 48 percent of the water used for irrigation comes from groundwater Withdrawals of groundwater are expected to rise as the population increases and available sites for surface reservoirs become more limited About 29 percent of the freshwater used in the United States in 2015 came from groundwater sources The other 71 percent
  • Water – at the center of the climate crisis | United Nations
    Climate change, population growth and increasing water scarcity will put pressure on food supply as most of the freshwater used, about 70 per cent on average, is used for agriculture (it takes





中文字典-英文字典  2005-2009