The successful candidate will serve as project manager,  analyze weed, arthropod, soil C and N, agronomic, environmental and economic data; collaborate with other investigators on project to publish findings, and participate in extension and grant-writing activities.  PhD in weed-, arthropod-, soil- or agro-ecology. Experience working with complex systems studies is desired but not required. The post-doctoral scientist will work directly in collaboration with David Mortensen (weed ecology), Mary Barbercheck (arthropod ecology), and Jason Kaye (biogeochemistry), graduate and undergraduate students, technicians, and a farmer advisory panel in guiding the research and outreach education associated with the project.  Please send CV and list of 3 references to Mary Barbercheck, meb34@psu.edu, by February 29, 2008.  For further information, contact Dave Mortensen, Penn State Dept. of Crop and Soil Sciences, dmortensen@psu.edu