1. A third of Africa is under threat of desertification.

2. If desertification continues to spread, the dust bowl will not only undermine the economy but also trigger a huge migration eastward.

3. Farming is leading to the desertification of large areas of the planet.

4. Achievements have been made in desertification prevention and control.

5. Desertification is the serious environmental and social economy problems.

6. The happening of regional desertification system is stochastic, complicated and multicomponent.

7. This paper analyzes desertification problem of heilongjiang province and states fathering countermeasure.

8. The desertification of land by the current world - wide attention.

9. Land desertification is the main ecological problem of northwest inland basin.

10. New situation of Chinese desertification demands transformat ion of the Three-North Forest Shelterbelt Program, which should solve the conf li ctions firstly.

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11. We are seeing more frequent floods, increased drought, desertification and water scarcity.

12. Desertification and rising aridity were the ultimate cause of the food price crisis of 2007-8, Gnacadja said, as it began with a drought in Australia.

13. Booming cattle breeding is a major cause of desertification in grassland.

14. Desertification of various degrees have been happening source region of Yangtze River.

15. There must be intrinsic mechanism of land desertification behind these activities.

16. Besides desertification and grassland shrinkage, the region's lakes and wetlands are also drying up, experts say.

17. Desert and desertification carry different meanings . The former has come into existence through geological ages.

18. In many instances this is too late to obviate desertification and soil erosion.

19. There is considerable dissension in the literature as to what precisely constitutes desertification.

20. There may be, too, a sottovoce challenge to the received wisdom that it is people who cause desertification.

21. Thus we do not intend to provide evidence here of frightening rates of soil loss and desertification throughout the world.

22. One of the first environmental hazards to be studied was that of desertification.

23. Essentially , soil erosion is the key causing rocky desertification.

24. In 1998, a group of archaeologists in force to do the difficulties and obstacles Rob desertification.

25. In 1998, a group of archaeologists arrived in force to do the difficulties and obstacles Rob desertification.

26. Planting out the approved Australian desert reversal, C4 photosynthesis pathway Bin Li Atriplex nummularia reverses sandification desertification and makes soil and soil carbon.

27. Based on the investigation and sampling analysis, the results showed that the tendency of petrification and desertification in soil surface layer was remarkable in Hainan's pineapple orchards.

28. The Tamarix community is the last line to prevent desertification development in the area; we should pay more attention to it and protect the community.

29. According to this hierarchy system, the distribution law of farmland desertification in Zhangwu County was studied primarily.

30. The results show that ( 1 ) the annual increment rate of desertification in Yanchi in past 40 years was 4.03% .

31. The important anthropogenic factors of resulting in land sandy desertification are the misplay of management, the high-speed increasing of population, and the over misuse of land resource.

32. No - tillage stubble measures can effectively control wind erosion and prevent desertification in Horqin Sandy Land.

33. Ban addressed a U . N. conference to combat desertification Wednesday in Madrid.

34. As a sunrise industry, sand industry has played an important role in building a well-off society in desertification areas.

35. For cost data on rangeland protection and restoration, we turn to the United Nations plan of action to combat desertification.

36. What should be done to further prevent land degradation and desertification?

37. Abstract: Desertification is the serious environmental and social economy problems.

38. When water content is less than, it bring abut contabescence for natural forest and manual vegetation, and acceleration of desertification.

39. Simulation of dust emission flux is very fundamental for evaluating climatic effects of dust aerosols and controlling desertification process and dust storm.

40. In order to analyze the composition and feature of spermatophyte genera in the desertification area in Gansu Province and explore their origin, authors of this article conducted a long-term survey.

41. According to this hierarchy system , the distribution law of farmland desertification in Zhangwu County was stu.

42. The western of Jilin Province is a typical compound system of nature, economy and society, with vulnerable eco-environment. The desertification and basification of the soil is serious there.

43. Desertification drains an arid or semiarid land of its life - supporting capabilities.

44. The necessity of soil stalinization and desertification was elaborated,[] and the development trend of government technology of soil stalinization and desertification at home and abroad was summarized.

45. The remote sensing quantitative retrieval model for the appraisable factors of desertification monitoring are founded.

46. The desertification land of the Ali plateau has the high-cold and arid landscape and the fragile bionomics property.

47. Therefore, the process of desertification control is the SD process.

48. The results reveal that land desertification, steppe degeneration, secondary soil salinization or alkalization, soil erosion and air pollution in urban areas are the most serious entironment problems.

49. Unmerited artificial action and frangibility of karst mountain area brought out many environment problems, such as soil leanness, absence of water resources and grave desertification.

50. M : And the worsening desertification is another major reason.

51. This result reveals habitat fragmentation caused by the desertification in this region.

52. Set up wind erosion trial zone at soil wind erosion and desertification serious areas, Carry on soil wind erosion monitor by the characteristic of local weathers and the plant.

53. Damages caused by desertification were assessed at millions of dollars.

54. In desertification and its opposite process i . e control of desertification, water plays the determinative role.

55. Desertification is a geological phenomenon affected by global climate, rocks on the earth's surface, and the development of regional geological structure.

56. In the region soil resources are destroyed frequently due to fierce wind erosion and desertification, affecting productive potential development.

57. One of a depressed area is located the desertification region, population is rapidly increasing come to 19.81% during 10 years.