Chronological history by decade from
History of Research at the U.S. Department of Agriculture and Agricultural Research Service
Blue=USDA research accomplishment
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Hogs under observation for cholera.
Lacey Act prohibited importation of injurious animals, birds, and fish.
Of gainfully employed persons, 38 percent were engaged in agriculture.
Mendel's work on heredity rediscovered.
Complement fixation test developed.
Began experiments with Egyptian long-staple cotton.
Reclamation Act passed.
Oily flavor in butter eliminated by pasteurization.
Dutch botanist, Hugo De Vries, announced his theory of mutation.
Pseudorabies of pigs–Aujeszky's disease–described and causative virus identified.
Existence and function of hormones discovered.
Sea Island, first wilt-resistant cotton released.
Wright Brothers demonstrated the first airplane.
Livestock Quarantine Act passed.
Demonstrated that alkali soils could be reclaimed by flooding.(more)
Developed live-virus vaccine for hog cholera.(more)
28-hour law required humane care of livestock in interstate shipment.
Meat Inspection Act passed.
First caterpillar tractor powered by gasoline engine produced by Holt Company.
American and European foulbrood diseases of bees differentiated.
Mediterranean fruit fly introduced to Hawaiian Islands.(more)
Founded the science of nematology in the U.S.
Send comments or questions about this historical timeline to Sean Adams.