Iowa Department of Agriculture and Land Stewardship
Bill Northey, Secretary of Agriculture

Historical Fertilizer Usage

CROP YEAR	PERIOD		TONS	TOTAL TONNAGE FOR CROP YEAR	TONNAGE CHANGE FROM PREVIOUS CROP YEAR
1981	July - Dec	1980	1890454	3941109
	Jan - June	1981	2050655
1982	July - Dec	1981	1632562	3679779	-261330
	Jan - June	1982	2047217
1983	July - Dec	1982	873366	2513518	-1166261
	Jan - June	1983	1640152
1984	July - Dec	1983	1586593	3842415	1328897
	Jan - June	1984	2255822
1985	July - Dec	1984	1363318	3730524	-111891
	Jan - June	1985	2367206
1986	July - Dec	1985	755046	3118609	-611915
	Jan - June	1986	2363563
1987	July - Dec	1986	703763	2913462	-205147
	Jan - June	1987	2209699
1988	July - Dec	1987	1126440	3145751	232289
	Jan - June	1988	2019311
1989	July - Dec	1988	1233862	3026247	-119504
	Jan - June	1989	1792385
1990	July - Dec	1989	1300690	3205199	178952
	Jan - June	1990	1904509
1991	July - Dec	1990	1435949	3296922	91723
	Jan - June	1991	1860973
1992	July - Dec	1991	1060288	3260465	-36457
	Jan - June	1992	2200177
1993	July - Dec	1992	1149352	3194962	-65503
	Jan - June	1993	2045610
1994	July - Dec	1993	1390310	3363078	168116
	Jan - June	1994	1972768
1995	July - Dec	1994	1515740	3235496	-127582
	Jan - June	1995	1719756
1996	July - Dec	1995	1766146	3538761	303265
	Jan - June	1996	1772615
1997	July - Dec	1996	1532533	3471781	-66980
	Jan - June	1997	1939248
1998	July - Dec	1997	1639704	3563879	92098
	Jan - June	1998	1924175
1999	July - Dec	1998	1708316	3310669	-253210
	Jan - June	1999	1602353
2000	July - Dec	1999	1621714	3527926	217257
	Jan - June	2000	1906212
2001	July - Dec	2000	1568907	3232554	-295372
	Jan - June	2001	1663647
2002	July - Dec	2001	1734942	3374260	141706
	Jan - June	2002	1639318
2003	July - Dec	2002	1788151	3525648	151388
	Jan - June	2003	1737497
2004	July - Dec	2003	1984929	4024054	498406
	Jan - June	2004	2039125
2005	July - Dec	2004	1814433	3860493	-163561
	Jan - June	2005	2046060
2006	July - Dec	2005	1716473	3702853	-157640
	Jan - June	2006	1986380
2007	July - Dec	2006	1839294	4172447	469594
	Jan - June	2007	2333153
2008	July - Dec	2007	2067271	4238681	66234
	Jan - June	2008	2171410
2009	July - Dec	2008	1369689	3368681	-870000
	Jan - June	2009	1998992
2010	July - Dec	2009	1585801	3701002	332321
	Jan - June	2010	2115201