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肥力分级
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  “肥力分级”译为未确定词的双语例句
     Primary Study on the Quantification of the Soil Fertility Gradation Ⅰ. Gradation of the Fertility and the Physical-Chemical Properties of the Paddy Soil of the Eastern Guizhou
     土壤肥力数量化分级初探 Ⅰ.黔东地区水稻土的肥力分级与理化性质
短句来源
     Research on the Quantification of the Soil Fertility Gradation(Ⅱ):The Economic Benefit Estimate of the Application for the Improve Soil Plan
     贵州省水稻土的肥力分级与其理化性质──土壤肥力数量化分级的研究(Ⅱ)
短句来源
     Research on the Quantification of the Soil Fertility Gradation Ⅲ: Fertility Gradation of Guizhou Dry Farming Soil with Its Physical and chemical Properties
     贵州省旱作土的肥力分级与其理化性质──土壤肥力数量化分级的研究(Ⅲ)
短句来源
     A Classification System for Potassium Availability in Soils for Sugarcane Planting Regions in Guangxi
     广西甘蔗种植区土壤钾素肥力分级研究
短句来源
     Employed grey link analysis to evaluate farm soil fertility for six samples, conclusion isthat farmlands of 4 sample are second-class, the other for third;
     应用灰色关联分析法对850农场参评的6个样本进行土壤肥力分级评价,4个样本代表的农田为二等,其它为三等;
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  相似匹配句对
     Study and Application of Quantitative Classification for Soil Fertility
     土壤肥力数量化分级研究及应用
短句来源
     GRADING OF TITANIUM DIOXIDE
     二氧化钛的分级
短句来源
     INVESTIGATION ON THE NUMERICAL METHOD OF GRADING PADDY SOIL FERTILITY
     水稻土肥力水平数值分级方法的探讨
短句来源
     soil fertility;
     土壤肥力
短句来源
     The Cleaning Effect of a Classifying Hydrocyclone
     分级旋流器的分选作用
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  fertility classification
Fertility classification of soil was assumed to be heterogenous inside each region and homogenous between regions.
      


In this paper, we try to grade soil fertility by mathematical methods of analsis of principal components and judgement of diseriminant functions. The classification involves the first and the second principal components as these two represent 60 per cent of all original information about twelve aspects of soil characteristics. We divided 25 soil profiles into five grades by setting up discrminant function formulas and secured satisfactory results. The results show that it is effective and feasible to use this...

In this paper, we try to grade soil fertility by mathematical methods of analsis of principal components and judgement of diseriminant functions. The classification involves the first and the second principal components as these two represent 60 per cent of all original information about twelve aspects of soil characteristics. We divided 25 soil profiles into five grades by setting up discrminant function formulas and secured satisfactory results. The results show that it is effective and feasible to use this method in appraisaing and grading soil fertility.

本文应用主组元分析和判别函数式判别的数学方法对土壤肥力的分级作了尝试,分级按第1、第2主组元进行,第1、第2主组元表达所用12项土壤性质原始数据信息量的60%;通过建立判函数式判别将25个供试土壤剖面分为5个级组,收到了较好的效果。结果表明这类数学方法在土壤肥力评价分级方面使用是有效和可行的。

The modernization of agricultural production and the scientifical and technological interchange require the gradation of soil fertility in quantification, which is also a domestic and overseas trend of the development of soil fertility science.According to the definition of soil fertility, the gradation is suggested by use of the biomqss of the plants growing on the natural soil but for agricultural soil the annual crop yield (ton / ha) is used in gradation.In this paper the paddy field of the eastern Guizhou...

The modernization of agricultural production and the scientifical and technological interchange require the gradation of soil fertility in quantification, which is also a domestic and overseas trend of the development of soil fertility science.According to the definition of soil fertility, the gradation is suggested by use of the biomqss of the plants growing on the natural soil but for agricultural soil the annual crop yield (ton / ha) is used in gradation.In this paper the paddy field of the eastern Guizhou is investigated. The relationship between the soil physical and chemical factors and chemical factors and its fertility gradation is analysed by statistical method of the correlation and regression and principal component anqlysis. Three factors are sieved out as the indirect indices of gradation, the indexes are proved to be mesurable and the method os simple and easy.In addition, the practical value of the fertility gradation plan in accordance with quantification is expounded from various angles. At last, the applicability of this means is also tuched.

本文分析了黔东地区的水稻土,对土壤各理化因素和肥力分级之间的关系,进行了相关、回归、以及主成分分析等大量的数理统计,筛选出3个因素作为分析的间接指标,并证明提出的肥力分级指标的可测性,其方法简便;此外,还从不同角度来阐明肥力分级数量化方案的实用性。

The calculation of the

用供氮率平均值计算氮肥施用量误差太大,按不同土壤类型、不同肥力分级选用参数,将极大的提高氮肥施用量的准确度。不论高肥区和低肥区,对氮素化肥的依存率都高于水稻,且中低肥力区增产效益明显高于高肥力区,重视增加中低产土壤氮肥的投入,是促进油菜大面积平衡增产的关键。

 
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