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耕地     
相关语句
  cultivated land
    Study on the Theory and Techniques of Cultivated Land Valuation
    耕地估价理论与方法研究
短句来源
    Cultivated Land Resources and Grain Security
    耕地资源与粮食安全
短句来源
    The Benefit of the Cultivated Land Utilization and Its Regional Differences
    耕地利用效益及其区域差异
短句来源
    Study on the Problems of Ru- ral Economy, Population, Grain and Cultivated Land in the Year of 2020 in China.
    公元2020年中国农村经济、人口、粮食和耕地问题研究
短句来源
    Value Accounting of the Cultivated Land in Plain Farming Area of the Yangtze River Delta─Case Study of Yangzhong City,Jiangsu Province
    长江三角洲平原农区耕地资源价值核算研究──以江苏省扬中市为例
短句来源
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  farmland
    DISCUSSION ON THE SUBJECT OF PROTECTING FARMLAND
    关于保护耕地有关问题的探讨
短句来源
    Prediction about changes in area of farmland in Shandong Province and Suggestions
    山东省耕地面积变化预测及建议
短句来源
    The results showed that the basic cultivated farmland (17.59 104 hectares) in the whole city can be divided into 6 grades, among which the IFI (Integrated fertility index) of the cultivated land at the first grade was bigger than 0.85. Its area was 2.07 104 hectares, accounting for 11.8% of total cultivated area.
    结果表明,全市17.60万hm2基本农田耕地可分为6级,其中,1级地IFI(地力综合指数)>0.85,面积为2.07万hm2,占总面积的11.8%;
短句来源
    The salt content in 0-10 cm soil layer is 42.28% of soil profile in woodland,and in farmland and grassland is the most significant in 30-60 cm soil layer.
    林地土壤盐分的表聚性较强,0~10 cm的盐分含量占到土壤剖面盐分含量的42.28%,而耕地和草地的盐分大量积聚在30~60 cm。
短句来源
    Results show that forest was increased by 8%,grassland was increased by 20%,and farmland was decreased by 38%. 1.03% of farmland was converted into woodland,and 57.49% of farmland,into grassland.
    研究结果表明,延河下河地区林地面积增加了8%,草地增加了20%,耕地减少了38%,并且有1.03%的耕地变为林地,57.49%的耕地变为草地。
短句来源
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  arable land
    POTENTIAL PRODUCTIVITY OF THE ARABLE LAND AND THE SURPLUS MANPOWER IN RURAL AREA OF ANHUI PROVINCE IN 2000
    2000年安徽省耕地生产潜力与农村劳动力剩余
短句来源
    Taking the Pingyin County as study area, result shows that the model is useful to evaluate rationality of spatial structure of arable land.
    选取具有典型低山丘陵特征的平阴县为研究区进行实证研究,结果表明,该模型能够较好地评价当前耕地空间结构的合理性。
短句来源
    The paper analyzed the course of agricultural mechanization of Jiangsu Province which average arable land of individual is only 2/3 of national average.
    为了探讨人多地少地区发展农业机械化的途径,对我国人均耕地面积仅为全国平均水平2/3的经济发达省份江苏省的农业机械化发展历程进行了实证分析。
短句来源
    ③ Having analyzed the impact of economic factor with Eviews3.1 software,results are deduced that it needs about new construction land 15.36 hm2 with the occupation of arable land 17.53 hm2,while the city's GDP rises 100million;
    ③运用Eviews 3.1软件对土地利用变化中经济因素的驱动作用做回归分析得出:全市GDP每增长1亿元,需要新增建设用地约15.36 hm2,减少耕地约17.53 hm2;
短句来源
    Meanwhile,with the increase of 1% urbanization,266.17 hm2 city land has to be extended and 389.3 hm2 arable land has been shrinked.
    城镇化水平每增加1个百分点,需要减少耕地面积389.3 hm2,同时扩展城镇用地266.17 hm2。
短句来源
更多       
  land
    Study on the Theory and Techniques of Cultivated Land Valuation
    耕地估价理论与方法研究
短句来源
    Cultivated Land Resources and Grain Security
    耕地资源与粮食安全
短句来源
    The Benefit of the Cultivated Land Utilization and Its Regional Differences
    耕地利用效益及其区域差异
短句来源
    On the Relationship between the Population andCultivated Land in Gangu County
    试论甘谷县的人口与耕地关系
短句来源
    Cultiva ed Land Problem and Protection Countermeasures in China
    中国耕地问题与保护对策
短句来源
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  cultivated land
Integrated indicators-based gradation of cultivated land quality in mountainous region of Southwestern China
      
The gradation of cultivated land is to assess the suitability of cultivated land for agricultural production in terms of natural and economic properties of land.
      
Formal and informal surveys, Delphi and comprehensive index method are adopted to identify appropriate integrated indicators, and measure the gradation of cultivated land quality.
      
The determination of integrated indicators presents three basic features of cultivated land quality: stable plant productivity, social acceptability and maintenance of environmental quality.
      
Research results meet with the needs of accurate degree of the gradation of cultivated land quality.
      
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  farmland
Quantitative site classification in the key county in the conversion of farmland to forests project
      
Carbon and nitrogen concentrations increased significantly with plantation age and had increased by 15.3-20.5-fold and 11.1-13.6-fold at 0-20 cm depth at the 18-year-old plantation compared with farmland soil.
      
korshinski contributed significant enrichment of C and N contents under their canopies compared with farmland.
      
The contents of aggregates of over 0.25 mm in two shrub land soils in the upper layer (0-20 cm) increased by 4.6% and 14.1% compared with farmland.
      
Forest watersheds and farmland watersheds with similar terrain features were selected through cluster analysis to study their runoff and sediment transport characteristics.
      
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  arable land
The decline of methane oxidizing activities in gray forest soil upon its conversion into arable land was shown to be caused by major changes in biotic and physicochemical properties of soil.
      
Microbial biomass and the content of microbial carbon in humus (Cmic /Corg) decreased in the following order: soils under forest cenoses-mowed meadow-10-year arable land-46- and 75-year arable land.
      
The pattern of their vertical distribution in areas with tree and shrub vegetation differs from that in arable land.
      
Effect of mechanical disturbances on nematode communities in arable land
      
Measurements showed significantly higher values of saturated hydraulic conductivity for topsoils in wetlands (6.2 m day-1 on average) compared to mown grasslands (1.47 m day-1) and arable land (0.79 m day-1).
      
更多          
  land
Our study indicates that the model can be applied to study the interaction between land surface processes and atmospheric boundary layers over various underlying surfaces and their regional climate effects.
      
Regularities of wind-erosion of different land-use types in Yongding River sandy land, Beijing
      
The threshold wind velocity of a number of variables was studied in four different land-use types: farm land, forestland, wild grassland and a flood plain in the Yongding River sandy land in Beijing.
      
The following conclusions were drawn: 1) The order of decreasing threshold of wind speed for sand displacement and surface roughness were forestland, wild grassland, farm land, sparse wild grassland and flood plain.
      
At a height of 0-20 cm, the height increased while the sediment discharge percent of sand flux decreased; there were significant differences in the sand flow formation under different land-use types.
      
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