"The idea is: If we can’t bring real-world cannabis into the lab, let’s bring the lab to the people.
Herbicide handbook / editor, William H. Ahrens Champaign (Illinois) : Weed Science Society of America, 1994 Seventh edition
To manage weeds, you should accurately distinguish the weed, consider the effect of the weed, and furthermore know the life cycle. Many weed administration procedures abuse the life cycles of weeds and utilize weed science qualities in the improvement of control techniques. Weeds might be grouped by their structure and shape, for example, grass species, sedges, or broadleaf weeds.
Weeds of the West by The Western Society of Weed Science