Almost bed time, so I can't do the math right now, but based on the following papers, how much additional money could be earned if they transitioned from rectan

Almost bed time, so I can't do the math right now, but based on the following papers, how much additional money could be earned if they transitioned from rectangles to hexagons? http://www.aces.edu/timelyinfo/BioSysEng/2008/October/BSEN-IRR-08-01.pdf http://www.aces.edu/timelyinfo/BioSysEng/2008/October/BSEN-I... http://www.k-state.edu/irrigate/oow/p07/OBrien.pdf http://www.k-state.edu/irrigate/oow/p07/OBrien.pdf The 2nd paper quotes a land cost of $139 / acre? / time.