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1. Unless the loess bones of me and keep you the centenary worryfree.

2. Loess is a clay that is easily cut and holds its shape; it can be incredibly accommodating as a building material.

3. How is the loess plateau to take form ?

4. Prehistoric Vegetation on the Loess Plateau: Steppe or Forest?

5. NO2 uptake on loess and laterite is first order.

6. By contraries, loess soil possessing of deep soil layer, suits for taproot tree.

7. Problems existing in improvement of loess ground by method of dentification by tamping and expansion are analyzed herein.

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8. Loess has the characteristics of structural properties, such as incomplete consolidation, collapsibility; And the multi-arch tunnel of highway has complex excavation steps and structure stress.

9. Lishi Tunnel is the first loess multi-arch tunnel in China. The designs of the tunnel are briefly introduced, including lining structure, prevention drainage treatments and construction process.

10. The last interglacial paleosol and last glacial loess units overlie the top of this section.

11. According to the structural property of loess and collapsible loess, the thesis has made further analysis of several consolidating methods for embankment by the project.

12. There is typical loess ravine terrain, more than ten large areas of the plateau, and is mixed plateau, ravines, girder, valley, flat plain, chain of mountains, slope in Qingyang research region.

13. Loess Plateau in North Shaanxi Province is an unenclosed ecology-economy system with characteristics of mountain area, and it is very fragile.

14. Stockbreeding is one of the traditional dominant industries on Loess Plateau, and it is also the foundation to develop the country economy in Northwest China.

15. Results showed that the amount of rainfall increased from the west to the east in the Loess Plateau in waterlog year, and from the north to the south in drought year.

16. At last, we provide the table of density of planting different variety of tree, and provide scientific basic for constructing the protective-forest on slope on Loess Plateau.

17. In recent years, the close-packed macadam piles are widely used in dealing with saturated loess base.

18. Secondly, the mainly problems of applying the shield technology to loess tunnels are rational predigestion of shield and reducing the project cost in according to the loess property.

19. It concluded that the Periploca sepium Bunge, as a alternative shrubbery specie which had wide fitting range of SWC, and could be planted in Loess Plateau especially in the south slope and escarpment.

20. The minor crops are tradition grain crops and the important industrial crops in dry farming area of the Loess Plateau, occupy the main body status in the crops production since the ancient times.

21. The adaptability of meadow brome is very strong in the most parts of the Loess Plateau.

22. Dingxi Prefecture is located in the foothill of the Loess Plateau, where the climate is arid or semi-arid.

23. By using soil-drilling method, this research investigated the root distribution characters of Robinia pseudoacacia in Weibei loess plateau.

24. Hippophae rhamnoide is a nicer shrub species for plantation becoming savageness. This population could renew very well in Hilly-gully region of Loess plateau.

25. The theoretical formula for calculating critical angle of cutting loess slope is derived based on Gradient current theory.

26. However, if the inferior conditions such as lack of soil water, severe loess of soil and water, scurviness ecological environment can restrict the sustainable development of seabuckthorn stand?

27. After that it is pointed out that compared with soil density changes, water content change can result in more variations of coefficient of thermal conductivity and specific volume heat of loess.

28. Nature conditions are scurviness in hilly and gully region on northwest loess plateau, which is one of the most serious region in our country.

29. The classification accuracy is unsatisfactory in the complicated terrain area of the Loess Plateau when the single supervised classification is used in the remote sensing investigation of slope field.

30. The result can be used to predict sorption kinetics of phenanthrene and naphthalene to loess soils and, .