Technical Support
Testing Procedures

Nitrogen

-The capped tube should be shaken vigorously for 2 minutes after the Nitrate WR CTA TesTab is added.

-Some tiny particles of the tablet may be visible once the tablet disintegrates. These particles will not totally dissolve and will not affect the test results.

-Wait 5 minutes for the color to develop. Compare the color of the solution to the color chart.

-Nitrogen is easily leached from the soil by rain and snow. Readings may be much lower than expected, particularly in sandy soils.