31.   Careful terracing prevents soil erosion in this hilly area during pounding summer rains.

32.   Cultivation increases the risk of soil erosion on hilly land and in windswept areas like the Great Plains.

33.   Exacerbated by flooding, the bad harvests are mostly the result of soil erosion, poor use of soil, lack of pesticides and other failing farm practices.

34.   First they put in railroad ties to stop soil erosion.

35.   Gaps exist in the fence, due to soil erosion and a drainage culvert that, if blocked, would cause flooding in a major rainstorm.

36.   He was referring to further depletion of the ozone layer, the increase of global warming and soil erosion.

37.   If indeed there is less soil erosion these days, then perhaps society as a whole deserves some of the credit.

38.   If soil erosion or other runoff degraded a stream, the Missouri Clean Water Act might allow regulators to cite the landowner.

39.   In Indonesia, El Nino-aided forest fires are under control, but acid rain, soil erosion and flooding now loom.

40.   It is obvious that they can be used to control soil erosion and create shade, but they can be used in other ways as well.