An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
 Image Number K10853-1 |
Accurate and precise determinations of nutrient levels in water and soil samples are essential for evaluating buffer effectiveness. Here, chemist Leila Hargett prepares water samples for nutrient analysis by automated colorimetry.
Photo by Peggy Greb.
