The past several growing seasons have been pretty tough on many ranchers in southern Oklahoma and northern Texas. Drought has caused many of the "good" native grasses in native grass plant communities to decline or die out. Where little bluestem and indiangrass once were, three-awn (ticklegrass), tumblegrass, and silver bluestem have established, not to mention high populations of ragweed, broomweed, bitterweed, and the like.