POSTDOCTORAL RESEARCH ASSOCIATE. The USDA, Agricultural Research Service, Soil and Water Management Research Unit in St. Paul, Minnesota is seeking a Research Ecologist for a 2-yr appointment. Aim of research is to quantify extent to which water treatment to reduce nitrate levels in agricultural drainage waters results in increased atmospheric N2O emissions. Knowledge of methods for quantifying mass transfer across soil- and liquid-gas interfaces and associated theory preferred. ARS unit is co-located within Dept. of Soil, Water and Climate at University of Minnesota, St. Paul. Project will involve collaboration with University faculty. Recent PhD required. Annual salary commensurate with experience ($57,503 - $68,922 plus benefits). Citizenship restrictions apply. Contact Dr. Rodney Venterea at 612-624-7842 or [EMAIL PROTECTED] USDA/ARS is an equal opportunity provider and employer.