The two main objectives of this project were to: (1) review and summarize the various interactions that can occur between invasive plants and fire, and developed management recommendations based on what is currently known; and (2) conduct new research to evaluate the specific interactions between fire, soil nutrients, and dominance by invasive annual grasses in arid and semi-arid regions of western North America. This final report for JFSP project 00-1-2- 04 explains how we accomplished these two objectives.