The result is a steady decrease in the number of trees and shrubs in fallows and a steady increase in grasses and weeds which are less effective in soil rejuvenation.
(The result; is; a steady decrease in the number of trees and shrubs in fallows and a steady increase in grasses and weeds) (grasses and weeds; are; less effective in soil rejuvenation)
The result grasses and weeds
is are
a steady decrease in the number of trees and shrubs in fallows and a steady increase in grasses and weeds
less effective in soil rejuvenation