The first-ever agricultural forĀ­um for likely presidential candidates, which is set for March 7 in Des Moines and has attracted a strong lineup of speakers, will offer Iowa Caucus voters a chance to hear the candidates’ views on key ag issues, the organizer of the Iowa Agriculture Summit said last week.

The forum will also act as a vehicle to prompt candidates to learn more about key agricultural issues and how government policies affect farmers as they run in Iowa for the caucuses set for early 2016, said Bruce...