How Does Microirrigation Help Prevent Erosion

Multiple Choice

How does microirrigation help prevent erosion?

A) by keeping water levels so low that there is no runoff
B) by putting micro-dams around fields, which prevents the silty water from escaping
C) by increasing the ability of plants to convert subsoil into topsoil
D) by increasing the depth of the roots, which in turn holds more topsoil
E) none of the above