Pond, George A.2014-07-182014-07-181945-06Pond, G.A. 1945. Why Farm Earnings Vary. Saint Paul, MN: University of Minnesota Agricultural Experiment Station. Bulletin 386.https://hdl.handle.net/11299/164057This archival publication may not reflect current scientific knowledge or recommendations. Current information available from University of Minnesota Agricultural Experiment Station: http://www.maes.umn.edu/en-USNewsletter or Bulletin