Which of the following is true regarding soil erosion?
A) Soil losses in North America have improved by 38% since 1950.
B) Less than half of the cropland in Canada and the United States is experiencing excessive rates of soil erosion.
C) Soil erosion cannot be controlled by planting on the contour.
D) Thirty-five percent of farms worldwide are losing soil faster than it is being formed.
Correct Answer:
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