Weeds Home --> Introduction to Rangeland Weeds --> The Definition of Weeds
Bureau of Land Management's Weeds Website/FAQs - Good overview of weeds, the general problem, and ways to control them. From the Bureau of Land Management. [Western Region] 
Noxious and Invasive Weeds - Weeds have invaded approximately 17 million acres of public rangelands in the West - more than quadrupling their range from 1985-1995. In northern California, yellow starthistle increased from 1 million acres in 1981 to 10 million acres today. From the Bureau of Land Management (BLM) in California. [Western Region]
Noxious Weeds and Non-native Plants: What Are They ? - Why We Should Care - Characteristics of weeds and how to fight them. Includes lists of weeds with descriptions. From the Colorado Weed Management Association. [Western Region]
Noxious Weeds: A Disaster Looking for a Place to Happen in Arizona!! - By Larry D. Howery and George B. Ruyle. Background information on weeds in Arizona and why they are an increasingly serious problem. From the University of Arizona AgNIC-Rangelands West. [Arizona]
Origin of the Species: Native versus Non-native Rangeland Plants - By Sherry Dodson. Defines terms and controversies surrounding the terms “native” and “non-native”. A non-native plant frequently fits several overlapping definitions. For example, a hybrid cultivar may be introduced to new region where it is able to establish and spread. It may remain a relatively benign exotic, blend in with the resident plant populations and be termed naturalized, or aggressively spread, form mono-cultures, and be listed as a noxious weed. From the University of Idaho, Rangelands Integrated Management. [Western Region]
The Weed Web: Noxious Weeds - Definition of weeds and a summary of why they are a problem. Also provides a good link describing how weeds affect you. From the Utah State University Extension. [Western Region]
What's Wrong with this Picture? Invasive Weeds: a Growing Pain - Brief explanation of weed terms. From the Bureau of Land Management. [Western Region]
This resource is developed by the Arid
Lands Information Center (University of Arizona)
in cooperation
with and support of the National
Agricultural Library.
   
http://alic.arid.arizona.edu/invasive/html/template4.asp?level1=introductionlevel2=definition
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