Irrigation systems can improve crop yield and can make land arable that would not otherwise support vegetation. Irrigation can stress or deplete water supplies and over-irrigating can waterlog or erode soil. These statements illustrate
A.
why soil salinity is increasing worldwide.
B.
the debates that commonly arise over the effects of agricultural innovation.
C.
why watershed maps and water rights under riparian law are no longer relevant.
D.
why farming should not be permitted in semiarid climactic regions.
E.
the general consensus that new farming technology and methods are beneficial.