Total-all    ----------------Plant Food---------------
Year    Fertilizer      Nitrogen        P2O5        Potash
         -tons-          -tons-        -tons-       -tons-
1950       2,473            NA        1,512            3 
1960       3,732            NA        1,775           42 
1970       7,843         1,520          903          869 
1980      15,286         3,190        2,067        2,236 
1985       9,807         2,033          765        1,518 
1990       9,241         1,918          866        1,264 
1991      10,951         2,195          981          960 
1992      11,668         2,400        1,386        1,865 
1993       9,222         2,029          873        1,077 
1994      11,915         2,472        1,207        1,674 
1995       7,110         1,573          793        1,081 
1996       7,853         1,627          934        1,167 
1997       9,503         2,239          931        1,132
1998       7,230         1,400          823        1,244

NA-Not available.

Source: University of Missouri Annual Fertilizer Tonnage Report