Series Is Presented Here As Two Variables--(1)--Original Data, 1910-1951 (2)--Original Data, 1949-1954. Source: U.S. Department Of Agriculture, Statistical Bulletin No. 83, Farm Production Practices, Costs And Returns, P. 26.
This NBER data series a01284a appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: a01284a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Crop Production Per Acre for United States [A0184AUSA343NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A0184AUSA343NNBR/, November 25, 2015.