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Winter 2012 - Northcentral
Statistics on the quantity of fertilizer sold in various states in the Northcentral region have recently been compiled and provided by The Fertilizer Institute (TFI) and the Association of American Plant Food Control Officials (AAPFCO). Data are now available from 1955 to 2010. Historical, annual data were available from 1975 to 2010. From 1955 to 1975, data were available every 5 years.
The Northcentral region in IPNI is composed of the following states: Illinois, Indiana, Iowa, Minnesota, South Dakota, and Wisconsin. Data for nitrogen, phosphorus, and potassium were aggregated across these states.
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