Posted 4/25/2015 22:14 (#4538012 - in reply to #4537390) Subject: RE: Totally serious question.
Central IL
Probably 25% of the land surface was under water year around in this area before drainage ditches and tile were installed back 50 to 150 years ago before modern wetland laws. The more recent pattern tile just improves the farm ability.
More on pattern tiling
