THE BUREAU OF SOILS investigates the quality of soils and their
adaptation to different kinds of crops, and the fertilizer sources
of the country.

THE BUREAU OF ENTOMOLOGY is concerned with the study of insects
and their relation to agriculture, including those that are
destructive to fruit, shade, and forest trees. Its work includes
the study and promotion of bee culture. It has carried on a
campaign for the eradication of such diseases as spotted fever,
malaria, and typhoid which are carried by ticks, mosquitoes,
flies, and other insects (see Chapter XX).

THE BUREAU OF BIOLOGICAL SURVEY maintains game, mammal, and bird
reservations, including among others the Montana National Bison
Range, the winter elk refuge in Wyoming, the Sully's Hill National
Game Preserve in South Dakota, and the Aleutian Islands
Reservation in Alaska. It studies the food habits of North
American birds and mammals in relation to agriculture,
horticulture, and forestry, and the habits, geographical
distribution, and migrations of animals and plants. It conducts
experiments and demonstrations in destroying animals harmful to
agriculture and animal husbandry and in connection with rearing
fur-bearing animals. It cooperates with local authorities in the
protection of migratory birds.

THE BUREAU OF CROP ESTIMATES gathers and publishes data regarding
agriculture, and particularly estimates relating to crop and
livestock, production.

THE WEATHER BUREAU is in charge of the forecasting of the weather,