How do you test the pH of the soil in the agriculture field ?

Explanation

1) Take about 2g of soil in a test tube.
2) Add 5 ml water to it.
3) Shake it well.
4) Filter the content.
5) Collect the filtrate in a test tube.
6) Add 2 drops of universal solution to it
7) Observe the colour.
8) Compare the colour with strip colour on the bottle and find the PH value.
In this way we can test the pH of the soil.