Thomas D. Whitson

Some of the weeds are too far south for Alberta but it is THE resource guide for finding out about weeds in your fields.

A weed is defined as: "A plant that interferes with management objectives for a given area of land at a given point of time," according to J. M. Torell, p. ix. A one page introduction is really to brief; and, it needs a detailed introductory chapter before launching directly into its alphabetical listing by Latin binomials.