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Published September 19, 2011, 12:00 AM

Big Iron main


Hundreds of Big Iron show-goers attended field tile demonstrations on Sept. 13, the first day of the event's three-day run at the Red River Valley Fairgrounds in West Fargo. (Mikkel Pates / Agweek)

  • Hundreds of Big Iron show-goers attended field tile demonstrations on Sept. 13, the first day of the event's three-day run at the Red River Valley Fairgrounds in West Fargo. (Mikkel Pates / Agweek)
  • Roger Ellingson (left), president and chief executive officer of Ellingson Companies, West Concord, Minn., talks with Hans Kandel, a North Dakota State University Extension Service agronomist, at a demonstration on field tile drainage at first day of the Big Iron ag trade show in West Fargo, Sept. 13. (Mikkel Pates / Agweek)
  • Hans Kandel, a North Dakota State University Extension Service agronomist, uses a sponge to demonstrate principles of field tile drainage, which he says can have positive effects on yields while not increasing spring flooding in the Red River Valley. (Mikkel Pates / Agweek)