Studies of types of farming in Iowa have as an objective the assembling periodically of both comprehensive and detailed information on the structure of Iowa agriculture and its economic units in terms of crops grown, livestock and livestock products produced, methods of cultivation and husbandry followed, and sources of income.
A second objective is a division of the state on the basis of the above information into areas and subareas that are fairly homogeneous in types of farming.
Holmes, C. L. and Crickman, C. W.
"Types of farming in Iowa, II,"
Bulletin: Vol. 33
, Article 1.
Available at: https://lib.dr.iastate.edu/bulletin/vol33/iss374/1