Question: how many tons of grass hay per acre?
Answer: The average U.S. dry hay yield (all types) dropped from 2.52 tons per acre in 2016 to 2.44 tons per acre in 2017. For alfalfa and alfalfa-grass mixtures, the average yield declined from 3.45 tons per acre in 2016 to 3.32 tons per acre in 2017.