• For testing of available Potash in Soil, first, prepare Potash -3. Add 2 ml      (20 drops) of Distilled water in test tube and then add a pinch (very small      quantity) of Potash -2 in test tube with the help of side corners of spatula.      After homozygous shake, Potash -3 is ready to use.
• Take 2 gm soil sample in mixing tube with the help of spatula.
• Add 5 ml Potash -1 with the help of measuring cylinder and shake it
       up to 1 minutes.
• Filter this mixture in the test tube with the help of filter paper and funnel.
• In filtrate, add 2-3 drops Potash -3 and shake it till the colour produced.
• Now, match the developed colour with the standard Potash colour rating      chart and note result.

   Caution: Keep store tester regents in dry and cool place and away from      children's reach.