Method of application: Weigh 1 part of dry soil and add it to 5 parts of water. Stir well and allow the particles to precipitate. Dip test strip into solution for 1-2 seconds and remove. After 30 seconds compare test strip with colour scale to determine the test result.
Storage: Avoid exposing the test strips to sunlight and moisture. Keep pack cool and dry (storage temperature not above +40°C).