I now post the most updated information on P removal structures on a new website with the USDA-ARS. https://www.ars.usda.gov/midwest-area/west-lafayette-in/national-soil-erosion-research/docs/phosphorus-removal-structures/
Here, you will find the new FREE software, P-Trap, and a series of training videos on how to design and construct P removal structures. Please contact me with any questions. chad.penn@usda.gov
