Of gainfully employed persons, 21.5 percent were engaged in agriculture.
Perishable Agricultural Commodities Act passed.
Plant Patent Act enabled the patenting of new plant
varieties, excluding sexual and tuber-propagated plants.
Tariff Act prohibited imports of meat and animals from
countries infected with foot-and-mouth disease. (more)
Strain 19 of Brucella abortus
developed; formed basis of brucellosis vaccine.
First cross made in the country's only
national pecan breeding program.
Controlled citrus blackfly in Cuba using
First electron microscope built.
Fungus that causes Dutch elm disease introduced into the
US-1 released; first USDA sugar beet
New citrus fruit 'tangelo developed, a
grapefruit and tangerine hybrid. (more)
Use of carbon dioxide tested as method
to retard produce decay; eventually led to method for protecting fruits in
Prepared pure crystals of vitamin C from lemon juice.
Katahdin released, first pest-resistant
Developed technique to produce spores in
commercial quantities. Allowed first large-scale use of a disease organism to
control an insect pest, Japanese beetles. (more)
Suter-Webb cotton fiber measure
Tennessee Valley Authority Act passed.
Farm Credit Administration established by Executive Order
Soil Erosion Service established, later known as Soil
Conservation Service, and today as Natural Resources Conservation Service.
Pantothenic acid discovered.
Stiff Stalk Synthetic released, one of the
most important germplasm sources of corn lines. (more)
Worst drought in U.S. history took place in the Great Plains and covered over
75 percent of the country. (more)
Jones-Costigan Sugar Act passed; replaced by Sugar Act in
Bankhead Cotton Control Act passed.
Taylor Grazing Act gave U.S. Department of the Interior
power to regulate grazing on public lands in the West.
Jones-Connally Act authorized appropriations for research to
eliminate disease from beef and dairy herds.
Kerr-Smith Tobacco Control Act approved.
Glanders of horses eradicated.
Accomplished first typing of a strain of
bacteria with bacteriophage.
USDA and Iowa State Experiment Station
imported Danish Landrace hogs.
Carizzo citrus rootstock released, base for
more than 60 percent of all United States citrus trees.(more)
Line 1 Hereford program started; one of the
longest continuing beef cattle line-breeding programs in the U.S.
Bankhead-Jones Act provided for expansion of agricultural research.
Sulfa drugs discovered.
Methods for genetic evaluation of beef
De Rouen Rice Act passed.
Tobacco Inspection Act passed.
Two farmers out of every five were tenant farmers.
Initiated National Poultry Improvement Plan
to improve production and marketing qualities of chickens and turkeys through
National Tillage Machinery laboratory
established at Auburn, AL to study factors applicable to the design of tillage
Developed concept of vegetative waterways,
which led to more than 500,000 miles of waterways that channel runoff and
prevent severe gully erosion.
Discovered that selenium is absorbed
from roots and carried to the foliage where it kills aphids; the first systemic
First hybrid crop cultivar (an onion)
developed using cytoplasmic male sterility.
Weymouth highbush blueberry released;
earliest cultivar in New Jersey.
Demonstrated that water normally lost to
runoff could be used to increase growth of grasslands using diversion dams and
First soil conservation district in the U.S. organized.
Published first electron micrographs of bacteria.
Observed that an insecticide applied to bean
plants was translocated from the outer surface of the treated leaves to leaves
that developed after the application.
Concho hard red winter wheat
Agricultural Adjustment Act established four regional research centers to
develop new uses for farm products. Locations were Wyndmoor, PA; Peoria, Il;
Albany, CA; and New Orleans, LA.(more)
Food, Drug and Cosmetic Act passed.
Bacillus thuringiensis first
sold as insecticide. (more)
Insect-sterilization technique for mating
First artificial breeding cooperative organized for dairy
Reported filarial dermatosis of sheep;
World War II began in Europe.
Usefulness of crossbreeding to improve the
efficiency of beef production demonstrated.
Federal Seed Act required truthful labeling on vegetable
seeds in interstate commerce and prohibited importation of low-quality
First grade standards were issued by USDA for a frozen