Nitrogen Testing Procedures

Illustration of a vial
  • 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.
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