This collection contains pamphlets, publications, and printed materials relating to demonstration farms throughout the state of Iowa. The reports include variety tests for different crops.

This collection contains pamphlets, publications, printed materials, membership materials, correspondence courses, letters and posters. The publication topics include the feeding of dairy cattle, how to improve your dairy herd, and the production of milk and other dairy products. The remainder of the collection consists of the Dairy Herd Improvement Association accounts, applications for membership, receipts, a tester's manual, demonstration information, and posters.

This collection contains pamphlets, publications, and printed materials focusing on agriculture and engineering (referred to as mechanic arts). The topics include building plans for farms, caring for livestock and equipment, and dealing with soil erosion.