What is the purpose of strip cropping?
a. prevent soil erosion
b. maintain nutrient levels
c. reduce plant disease
d. all of the above

The correct answer is A. prevent soil erosion. It is a process in which farmers gather crops in alternate strips instead of just going all out and picking up everything that they can. This prevents erosion because the land can't be moved, which is why it's great for having farms on lands with slopes where erosion could be really troublesome.