The average value of an acre of Iowa farmland increased 15.9 percent in 2010, according to an annual ISU Extension survey. The statewide average land value as of Nov. 1, 2010 was $5,064 an acre, up $693 per acre from 2009. “We need to watch the land values and be prudent, but I don’t think we need to be overly pessimistic there will be a crash in values anytime soon,” said Mike Duffy, ISU Extension economist who conducts the survey.