Browse Items (1817 total) for Iowa State University Library Photograph Collection

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Tractor mounted pest and weed sprayer lecture, 1949

A group of students listen to an instructor explaining the use of a tractor mounted pest and weed sprayer.

Students building terraces, 1949

Several individuals are using survey rods and transits to build terraces in a farm field. Another group of individuals and a tractor are in the background.

J. Bruce Liljedahl and students, 1947

J. Bruce Liljedalh and three students study the blueprints of a wooden buildings model.

Checking a tractor carburetor, 1947

Four men listen to an instructor explaining a tractor carburetor. The group of men are standing next to a John Deere tractor.

J. Bruce Liljedahl and students, 1947

J. Bruce Liljedalh and three students examine a the strength of a wooden truss on a building model.

Two men measuring a plowed furrow, 1942

Two men are standing in a plowed field. One is holding a measuring rod while the other users a stretched rope to indicated the depth of the furrow.

Student with measuring rod, 1942

A man is standing in a plowed field measuring the depth of a furrow with a measuring rod. The furrow is considerably lower than the surrounding area.

Plained furrows, 1942

A group of three men are standing in a plowed field. The furrow in the middle is considerably lower than those on either side.

Examining a horse hitch model, 1940

A horse hitch model with five horses is examined by a group of men.

Steel roof experiment, 1938

A group of three men examine the steel roof on a farm building.

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