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1891. Erickson, L.C., C.I. Seely, and E.W. Whitman. 1948. Using 2,4-D for selective and non-selective weed control.. ID Extension Bull. 172.
Early discussion of the use of 2,4-D. Various formulations, application rates, methods. Grain yields reduced 5-15% when treated with enough herbicide to kill 90% of common annual weeds.