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Nitrogen-fixing bacteria and legumes.
Describes the importance of nitrogen-fixing bacteria on crops of legumes.
Date:
December 1937
Creator:
Leonard, Lewis T. (Lewis Thompson), 1885-
System:
The UNT Digital Library
Soil and water conservation in the Pacific Northwest.
Describes types of erosion and methods for preventing the erosion of soil by water and wind.
Date:
July 1937
Creator:
Rowalt, E. M.
System:
The UNT Digital Library