| 1. | Standard test method for particle - size analysis of soils
土壤粒度分析的标准试验方法 |
| 2. | Particle - size analysis
粒度分析 |
| 3. | On application of laser grain - size distribution meter in particle - size analysis and research of sediment in the yangtze river
激光粒度分布仪在长江泥沙分析研究中的应用 |
| 4. | Standard practice for wet preparation of soil samples for particle - size analysis and determination of soil constants
土壤粒度分析和常数测定用样品的湿法制备的标准操作规程 |
| 5. | The main results were as follows : ( 1 ) due to their different working principles , the measured result of clay content by laser particle - size analysis was lower than that by using pipette and sieve analysis . the classification results of soil texture by using these two methods agreed well with each other
主要结论如下： ( 1 )由于激光法和吸管法原理的不同，激光法测得的粘粒含量较吸管法低，但是在土壤质地分类上，激光法和吸管法的结果基本一致。 |
| 6. | A preliminary study was carried out on the method of acquiring parameters for soil dual - porosity model and the analysis for the simulation of soil nitrate leaching by dual - porosity model . the feasibility and experimental conditions of soil particle size analyzing by the laser particle - size analysis was discussed , based on the comparison results of nine soil samples by the laser particle - size analysis and traditional pipette and sieve analysis
本文初步探讨了土壤两域模型的参数获取方法及两域模型应用于土壤硝酸盐淋洗的模拟分析，为进一步研究优先流以及分形理论在土壤溶质(包括养分)运移研究中的应用打下基础，以更准确地模拟和预测农田土壤硝酸盐的淋洗，为农田水肥优化措施提供依据。 |
| 7. | In this study , three typical high - resolution holocene soil profiles in the weihe valley were studied using particle - size analysis , measurement of magnetic susceptibility , total fe , toc , caco3 , rare earth elements and others . the results provide new insights into pedogenic environmental evolution and human impact of cultivation on soil development in this climatically sensitive semiarid zone
通过对各指标实验结果及其成壤环境意义的分析，探讨了全新世渭河流域成壤环境的演变以及土壤发育的特点；并借助历史文献和环境考古的成果，分析了人类活动与成壤环境之间的相互作用及其人地关系演变的过程。 |
