Routine soil testing methods for phosphorus have been developed for decades and have been calibrated using agronomic parameters, primarily crop yield or similar performance measures. The SERA-IEG-6 group and its predecessors, which represent many years of professional work in soil testing and calibration, wishes to express serious reservations about inadequately researched efforts which attempt to interpret such P soil test results in terms of potential for causing environmental damage. We urge that research continue to be supported which would lead to development and calibration of environmental P tests.