| 1. | Soil aggregate formation and stability as effected by root growth of ryegrass
冰草根系生长发育对土壤团聚体形成和稳定性的影响 |
| 2. | Study on field test of rock - soil aggregate on right bank of longpan in tiger - leaping gorge area
虎跳峡龙蟠右岸土石混合体野外试验研究 |
| 3. | Soil quality - measurement of the stability of soil aggregates for assessment of liability to surface sealing and hydric erosion
土质.表面密封和水腐蚀倾向性评定用土壤集料稳定性的测量 |
| 4. | 3 . the relationships between soil aggregate stability and soil characters demonstrated that , soil aggregate stability index was only related to the certain soil characters
在团聚体稳定性指标之间，湿筛后颗粒的mwd与粉粒含量、 5 rnpad和zmad呈显著负相关。 |
| 5. | Pam treatment can prevent the disintegration of soil aggregates , even improve the structure of soils and prevent crust formation . pam , with high viscosity , can significantly increase water infiltration
Pam具有良好的黏结力，能有效改良土壤的表层结构，维护了土壤孔隙连通性，增加土壤的入渗率。 |
| 6. | The breakdown of soil aggregates was the premise of soil erosion , and dispersion ratio explained the stabilization of soil aggregates of six experimental soils , which was calculated by the content of micro - aggregates
以微团聚体含量为基础计算的分散率，说明了六种供试土壤团聚体的稳定性，第四纪粘土红壤团聚体稳定，花岗岩红壤团聚体较易破坏。 |
| 7. | The chemical analysis of the soil extracted solution has shown that the soluble salt in the soil is predominated by the divalent ions ca2 + and mg2 + which mean that the soil aggregates have been chemically stable during the field experiment
同时，对土壤浸剂液的化学成分的分析结果表明，浸提液中二价的钙、镁离子占优势，这使土壤微团聚体处于一种化学稳定的状态。 |
| 8. | It is more and more important to determine the shear strength of rock - soil aggregate mixture quickly and accuratly while the mixture is widely used in roadbeds , dykes , dams and foundations
摘要随著土石混合料越来越广泛地被道路、堤坝、基础等工程采用，快速、准确地确定其抗剪强度指标显得越来越重要，室内大型直剪试验具有操作简单，可快速测定混合料的强度指标等特点，因而在工程中被广泛应用。 |
| 9. | Abstract : through a study on soil aggregate composition , nutrient status and enzymatic activity under mixed forest of chinese fir alniphyllum fortunei and pure stand of chinese fir , the results indicated that , compared to pure stand , the soil structural property was ameliorated , the soil capacity of nutrient supplying and was improved , and the soil enzymatic activity were enhanced
文摘:通过对杉木拟赤杨混交林及杉木纯林土壤团聚体结构、土壤养分状况及酶活性的研究表明，与杉木纯林相比，混交林土壤结构性能得到改善，供肥和保肥能力加强，各种土壤酶活性提高，土壤肥力较好。 |
| 10. | Secondly , essential law of soil crust formation was obtained : when coarse sand exceeded 50 % , soil crust dominated by depositional crust would be formed . when soil clay exceeded 30 % and soil aggregated degree was less than 140 % , soil surface tended to form soil crust dominated by structural crust
四、土壤聚合剂聚丙烯酰胺( pam )对控制表土结皮形成的效果： pam能控制表土结皮形成的主要原因是， pam能改善土壤的结构状况，显著提高土壤团聚体的稳定性，从而有效的抑制了表土结皮的形成。 |
