"Rangelands"

Land on which the native vegetation is predominantly: grasses, grass-like plants, forbs, or shrubs. Includes lands revegetated naturally or artificially when routine management of that vegetation is accomplished mainly through manipulation of grazing. Rangelands include natural grasslands, savannas, shrublands, most deserts, tundra, alpine communities, coastal marshes and wet meadows."
Def'n: http://www.roseworthy.adelaide.edu.au/~icooper/glossary/r.htm

Read about the assessment of rangelands for their carbon potential