Agricultural progress in the 20th century has (1) brought major changes to agriculture, (2) supported national economic development, (3) benefitted society as a whole more than it has agriculture.
Heady, Earl O.; Mayer, Leo V.; and Tweeten, Luther G.
"Agriculture's Story: Progress and Problems,"
Iowa Farm Science: Vol. 19
, Article 4.
Available at: https://lib.dr.iastate.edu/farmscience/vol19/iss10/4