Sharples, JerryPerrin, Richard2021-02-252021-02-251967-08-01https://dr.lib.iastate.edu/handle/20.500.12876/95654<p>Use of fertilizer in Iowa is increasing much more rapidly than the national average. Farmers also are changing to different types and kinds of fertilizers.</p>articleisulib-bepress-aws-west286121813467farmscience/vol22/iss2/3Agriculture