F.J. Sikora
The North American Proficiency Testing (NAPT) program, directed by the Soil Science Society of America (SSSA), was developed to allow soil test laboratories to evaluate results from their various analytical test methods with results from other laboratories. The data gathered from the analyses of the soil samples over the years has resulted in a rich set of data. A database was designed for quick and easy access to the NAPT data for facilitating research and teaching in soil science.
To access the database, click on “NAPT Database (1999-2006)” above. Save the file to your local computer. The file name is “NAPTsoil.mde”. The database was created with Microsoft Access 2002. You need Microsoft Access 2002 or Microsoft Access 2007 to be able to open the file. Double-click on the saved file to open.