Description, habitat, biology, ecology, agricultural importance, common names, world map of distribution, and illustrations.

Description, habitat, range map and methods of control for each species. Color photographs. An excellent table cross-indexes each crop species with herbicides and modes of application.

Descriptions of over 500 weeds. Part I concerns weeds and their control. Part II arranges weeds by family, with key. Most comprehensive survey of weeds of the United States and Canada.