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 Decade: 1930-1939
 Collection: Environmental Policy Collection
Arbor day, its purpose and observance.
Discusses Arbor Day as a holiday that recognizes the importance of United States forests and discusses a citizen's duty to preserve them and foster new growth of trees. digital.library.unt.edu/ark:/67531/metadc3441/
Dual-purpose pines.
Describes dual-purpose pines, which yield both naval stores and wood; provides suggestions for managing dual-purpose pines. digital.library.unt.edu/ark:/67531/metadc1813/
Game management on the farm.
Describes ways that a farmer can support game on his land to make the best use of otherwise wasted land. Provides an overview of practical game management practices. digital.library.unt.edu/ark:/67531/metadc6168/
Legumes in soil conservation practices.
Describes measures for preventing soil erosion through the planting of legumes. digital.library.unt.edu/ark:/67531/metadc1561/
Mosquito remedies and preventives.
Describes measures, substances, and materials, both offensive and defensive, that have been found most effective against mosquitoes. digital.library.unt.edu/ark:/67531/metadc3428/
Nitrogen-fixing bacteria and legumes.
Describes the importance of nitrogen-fixing bacteria on crops of legumes. digital.library.unt.edu/ark:/67531/metadc3406/
Soil and water conservation in the Pacific Northwest.
Describes types of erosion and methods for preventing the erosion of soil by water and wind. digital.library.unt.edu/ark:/67531/metadc3407/
Soil-depleting, soil-conserving, and soil-building crops.
Discusses soil conservation in a clear and concise manner. Discusses soil building, soil conserving, and soil depleting crops as well as the minerals to be found in soil. digital.library.unt.edu/ark:/67531/metadc5986/