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Minimum tillage in the Southwest
- Harris, Karl., Erie, Leonard J., Fuller, Wallace Hamilton., and University of Arizona Agricultural Experiment Station.
- Bulletin (University of Arizona. Cooperative Extension Service) ; A-39 1965
- Tillage -- Southwest, New, Minimum tillage -- Southwest, New, minimum tillage, and Southwestern United States
- Agricultural Experiment Station & The Cooperative Extension Service, University of Arizona
- USDA publications