How to Control ThemBook - 1939
"Good rotations and efficient farm practices will subdue weeds. Three main principles of weed control must be observed: (1) prevent weeds from maturing seed on the farm, (2) prevent the introduction of weeds on the farm, and (3) prevent perennial weeds from making top growth."--verso.
Publisher: Washington, D.C. : U.S. Dept. of Agriculture, 1939.
Edition: Slightly rev. Oct. 1939.
Characteristics: 29 p. : ill. ; 24 cm.