Potassium

The average potassium content of the earth surface is estimated at 2.3%. Potassium plays a vital role in the physiological and biochemical function of the plant. The exact function is not clearly understood, but many beneficial factors are demonstrated – enhance disease resistant by strengthening stalks and stems, activates various enzymes, thicken cuticle, enhance fruit size, flavor, texture and development, and is involved in the production of amino acid, chlorophyll, and starch, and aid in the transportation of sugar.

 Procedure for test

1. Transfer 3ml of soil extract into a Potash A Tube.
2. Add one Potassium Reagent B Tablet, cap and swirl until tablet is dissolved
3. Add 5ml of Potassium Reagent C slowly, allowing it to run down the side of the tube.
4. Stand the graduated Potash Tube B on the plexiglas with solid black line, and add the solution slowly, while looking from the top of the tube B until the black line seems to disappear.
5. When you cannot see the black line read the result from the graduated scale on the tube B.

Checking soil texture