After harvesting their main crops, such as corn and wheat, many farmers plant a second crop called a cover crop. This cover crop grows during the fall and winter and is then plowed over in the spring. What is the main purpose of a cover crop?
A. to remove excess chemical fertilizers and pesticides from the soil
B. to make use of excess seed left over from the previous year
C. to prevent erosion of the topsoil by wind and water
D. to feed wild animals, such as birds and mice, over the winter

Question

After harvesting their main crops, such as corn and wheat, many farmers plant a second crop called a cover crop. This cover crop grows during the fall and winter and is then plowed over in the spring. What is the main purpose of a cover crop?
A. to remove excess chemical fertilizers and pesticides from the soil
B. to make use of excess seed left over from the previous year
C. to prevent erosion of the topsoil by wind and water
D. to feed wild animals, such as birds and mice, over the winter