Date: | 10 13 1938 |
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Description: | A farmer using a Ronning ensilage cutter powered by a Farmall F-30 tractor to harvest corn on the Purdue University livestock farm. |
Date: | 07 1951 |
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Description: | Graphic from University of Wisconsin Extension Service Special Circular 20 showing progress in transportation and economics and posing the question "have o... |
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