Data Are For Acreage Harvested. Source: Data For 1866-1910: The Food Research Institute, "Wheat Studies", Volume Ii, Number 7, Pp. 260-261. Data For 1911-1944: U.S. Department Of Agriculture, "Agricultural Statistics", 1942 And 1951. Data For 1945-1952: Usda, Crop Reporting Board, "Crop Production", Mimeographed Release, July 1, 1952.
This NBER data series a01030 appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: a01030
Release: NBER Macrohistory Database
National Bureau of Economic Research, Wheat Crop Acreage for United States [A01030USA383NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A01030USA383NNBR/, July 7, 2015.