Soil Nitrate Testing for Willamette Valley Vegetable Production

Dan M. Sullivan, Nick Andrews, Aaron Heinrich, Ed Peachey and Linda Brewer
EM 9221 | Revised August 2023


A soil nitrate test measures the concentration of nitrate in the soil at a specific moment in time, including nitrate originating from organic inputs, fertilizer, and soil organic matter. This publication describes how to use in-season soil nitrate testing to adjust sidedress N fertilizer application rate to match crop N requirements.

About the authors

Was this page helpful?