The Nitrate Color Slider is a free web tool that replaces the printed color chart included with our on-site nitrate test kits. Simply slide the lever to match the color of your test result — no download, no guesswork, no printed chart needed. Use it with any of our on-site kits for a clearer, more precise picture of the nitrate status of your sample. Follow kit instructions carefully for accurate results.
→ Use the Nitrate Color Slider
Compatible with all of our on-site nitrate test kits:
- Dry Forage Nitrate Test Kit
- Green Forage Nitrate Test Kit
- Soil Nitrate Test Kit
- Water Nitrate Test Kit
Why nitrate levels matter for your operation
Forage plants take up excess nitrate during drought, and levels can accumulate to toxic concentrations for livestock — causing slow growth, low birth weight, decreased milk production, and even death. Accurate, timely testing is essential.
Please note: The U.S. Drought Monitor maps are updated every Thursday. Click on the map image below to visit the site and view the current map.
The USDA's Small Business Innovation Research program funded NECi to develop kits specifically for wet and dry forages:
- Choose the Green Forage kit for silage, green chop, or standing hay — if you can squeeze out a few drops of sap, this is the kit for you.
- Choose the Dry Forage kit for hay, wheat stalks, or anything dry. You'll need a blender to prepare your material.