AMES, Iowa -- How much corn can corn growers grow? This year the answer was 171 bushels per acre for Iowa farmers, but just 151 nationally -- while some producers in corn yield contests have averaged more than 350 bushels per acre. ISU Extension corn agronomist Roger Elmore says a state average over 300 bushels per acre will not happen anytime soon, but research is ongoing to maximize corn yields. Elmore says the potential is there. 

Listen to the interview. (Time 12:40)

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