Percentage cover of herbaceous plant species, soil and environmental data were collected at 205 sites in the Olary Ranges in the North -East pastoral district of South Australia. Of 337 species recorded, 65 were exotic species (weeds), mostly of Mediterranean origin, and only 15 sites were free of weeds. Correlation and multi -variate linear modelling (GLIM) showed that increased levels of soil nutrients and available water permit greater weed invasion of grazed native pastures. Elevation is indirectly related to weed invasion due to auto -correlation with rainfall and the history of heavy grazing in the ranges.
Full-text publications from the Australian Rangelands Society (ARS) Biennial Conference Proceedings (1997-), Rangeland Journal (ARS/CSIRO; 1976-), plus videos and other resources about the rangelands of Australia.