6. Which of the following does not control soil erosion?
A. Animals dig soil for home.
B. Trees serve as windbreaks.
C. Building terraces on slopes for planting.
D. Leaves and mosses cover the forest floor.
7. This technique involves alternately planting different crops in strips.
A. contour plowing B. crop rotation C. rip rapping D. strip cropping
8. The technique of plowing across the slope to form ridges.
A. contour plowing B. crop rotation C. rip rapping D. terracing
9. It refers to planting crops in a different spot each year.
A. contour plowing B. crop rotation C. strip cropping D. terracing
10. A farmer’s field is on the slope of a mountain. How can he prevent the soil from
being washed away from the rain?
A. Use crop rotation. C. Build a fence around the field.
B. Use contour plowing. D. Build a canal at the foot of the mountain.