In Terrain with Steep Hill Slopes,which Crop and Cultivation Technique

Multiple Choice

In terrain with steep hill slopes,which crop and cultivation technique will minimize soil erosion?

A) corn; rows trending straight down the slope,frequent cultivation
B) apples; land between the trees is planted in grass and not cultivated
C) winter wheat; after the harvest,the field is plowed and left idle until next fall
D) bean; rows are spaced wider than on a level field