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The spread of noxious and invasive weeds on all land is a national problem that threatens rangeland and farmland productivity. [Ex. Order 13112 Invasive Species, (Feb. 3, 1999)].Salt Cedar, hoary cress, knapweed, chicory and cheat grass are noxious weeds that are particularly abundant in East Rio Arriba SWCD and adversely impact rangeland and farmland productivity. Any surface disturbing activities have the potential to increase the presence and spread of these noxious weeds. Weed seeds are transmitted primarily by wind, wildlife and birds but will take root more easily where the surface is disturbed. East Rio Arriba SWCD has a weed control program in place, in cooperation with the neighboring Upper Chama SWCD.