Source: The American Fertilizer, August 1894, P.101; June 1898, P.248; February 1904, P.12; October 1904, P.23; October 22, 1910, P.21.
This NBER data series a01298 appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: a01298
Release: NBER Macrohistory Database
National Bureau of Economic Research, Commercial Fertilizer Consumption for Georgia [A01298US000GAA612NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A01298US000GAA612NNBR, May 24, 2016.