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31. Massive soil erosion and disruption of the natural drainage pattern destroyed the land's productivity.

32. Soil erosion is a main contributor to water pollution.

33. Severe deforestation has accelerated soil erosion and reduced productivity.

34. China's Yellow River Basin,(www.Sentencedict.com) soil erosion is very serious.

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

36. The value of R, erosive force of rainfall, is the best index judging soil erosion, and is also one of the basic factors used for setting up prediction model of soil loss.

37. The third major indirect cost of soil erosion is the loss of navigability.

38. The authors discovered that the sharp plough decrease, soil fertility decline, soil pollution, water and soil erosion and sandiness are primary problems at present through investigation and analysis.

39. As a result of in arid, semi-arid climatic zone, soil erosion and sediment deposition in Iran are very serious and have become one of main problems influencing national development.

40. El Salvador has earned the dubious distinction of having the worst soil erosion in continental America.

41. Short - sighted action of lumbering in a destructive manner destroys vegetation[sentencedict.com], and causes soil erosion.

42. The soil erosion is a complex geomorphological process caused by the endogenic and exogenic force.

43. The soil erosion in the alluvial gold deposit is serious because of the vegetation destroyed.

44. Droughts and accentuation of soil erosion cause havoc in such areas , making their rehabilitation extremely difficult.

45. Because of the terrain and physiognomic characteristics of basins in ka rst areas, soil erosion and water reserve in basin bottom are severe.

46. The Honghe River basin suffers from low plantation coverage and water and soil erosion.

47. First, soil erosion modulus can be estimated by using water erosion model, and the maps of soil density and soil horizon thickness can be derived from soil detailed survey data.

48. Urbanization may cause the change of fluvial geomorphological process system and aggravate the soil erosion and the flood threat.

49. The results show that: the soil erosion of wind power field construction region is intercoupling with particularity of wind power field and characteristics of soil erosion of Bashang region.

50. Tillage erosion is a new field of soil erosion research.

51. Soil load estimation is one of the key issues in soil erosion research.

52. In the first stage of the study period talked above, some passive human activities such as deforest and reclamation accelerated soil erosion and resulted in more soil and water loss in this period.

53. INAA techniques of tracing REE applied to studies of soil erosion has been introduced in this paper.

54. High accuracy DEMs is an important data in study of soil erosion and terrain feature space analysis.

55. Under the immense population pressure, serious soil erosion emerged because of the over-exploitation of natural resources in the Southern mountainous areas in the Qing dynasty.

56. The buck-toothed creatures helped extinguish nearly one-eighth of Australia's native mammal species and led to the extinction of countless numbers of plants, leading to widespread soil erosion.

57. GIS software is utilized to index resulting data and to extrapolate soil erosion sensitivity analysis.

58. Soil erosion and non - point source pollution are two serious environmental issues.

59. Soil erosion by rain and wind is a serious problem here.

60. There are many problems in the ethnic regions of western Sichuan Province, such as seismic active zone, serious water and soil erosion, fragile eco-environment, low level of economy, etc.