Annual row crops such as ________ cause the highest erosion rates because ________.
A. Wheat and coffee; they need so much water
B. Beans and coffee; trees are usually cut down for the fields
C. Tea and beans; plowing in the fall is required for planting of these annual spring crops
D. Corn and coffee; they use so many nutrients
E. Corn and beans; soil is left bare for the majority of the year
Answer: E
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