Aluminum

Aluminum is widely distributed in nature. Why it is essential to plants has not been established, but it in known to be toxic to some plants.

Procedure for test  

1. Transfer 2 drops of soil extract into a spot plate.
2. Add 2 drops of Universal Extracting Solution and one drop of Aluminum Test Solution, stir and let stand for one minute.
3. Match resulting color to Active Aluminum Color Chart.