Total-all    ----------------Plant Food---------------
Year    Fertilizer      Nitrogen        P2O5        Potash
         -tons-          -tons-        -tons-       -tons-
1950      6,073             NA         3,598           19
1960     10,880            621         4,031           96
1970     13,949          2,871         1,421        1,568
1980     13,945          2,894         1,446        1,991
1985     15,471          3,545         1,582        2,052
1990      9,478          2,004         1,209        1,626
1991     12,129          2,710         1,587        2,022
1992     12,558          2,496         1,950        2,270
1993     11,239          2,568         1,328        1,817
1994      8,599          1,675         1,008        1,853
1995     14,143          2,722         1,801        2,765
1996      9,073          2,164           954        1,329
1997     12,376          2,196         1,644        2,551
1998     10,657          2,122         1,458        1,732  

NA  Not Available

Source: University of Missouri Annual Fertilizer Tonnage Report