The second meaning is perhaps a play on the traditional ineptitude of rustic folk. Interesting that this particular word was chosen, I think.
a. Of or pertaining to agriculture; connected with husbandry or tillage of the ground.
b. slang. Applied to a clumsy stroke in cricket.
c. agricultural ant: a species of ant, such as the Pogonomyrmex barbatus of Texas, that clears the vicinity of its nest of verdure or herbage except for that on which it feeds.