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reference landing中文是什么意思

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  • The soil in copper - ore - tailings reservoir was compared with that in reference lands to find out the differences between them in physical and chemical natures and in heavy metals pollution
    通过合理选择不同对照地,从土壤的理化性质、被污染程度比较,为尾矿库复垦的土壤改良提供依据。
  • In conclusion , by the setting and application of double series of reference land units , we can get reasonable classification results ; moreover , the reference land units method has some study and application values which can provide as a reference method or model for other counties in china
    总之。优质、劣质双向式标准样地体系的建立与应用,不仅能够得到可靠的分等结果,而且具有一定的研究与应用价值,可为我国县域样地法分等提供方法与模式参照。
  • These imply that the spatial distributions of the different grades of the arable land , classified by the reference land unit method , reflect reasonably the spatial changes of geomorphological units and soil types . the linear estimation model between comparable productions and the corresponding quality ratings of 210 sample units shows that the coefficient of determination r2 is 0 . 876 , which means that 87 . 6 % of the change of y is explained by the change of x . it is concluded that the arable land quality ratings calcul ated by the method can reflect the biologic productivities of land
    另外,利用210个样点单元的标准粮产量( y )与其对应样地法土地质量分( x )进行线性拟合,判定系数r ~ 2等于0 . 876的含义是指y的变异中有87 . 6是由x引起,表明了样地法土地质量分的高低较好地反映了耕地的生物生产力水平。
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Last modified time:Mon, 18 Aug 2025 00:29:56 GMT

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