The small pit represents the energy of the whole plot. What is seen inside the bubbles reveals a buried bone (shalya) or another negative-energy element, or an outside influence (bahari hawa). How dirty or clean the water stays at the end shows the health, wealth and peace of the land. The full method takes two to three hours to teach, and the practical takes about an hour.
Some lands do not become fine with ordinary treatment. On lands where the water turned anticlockwise, the 16 sanskars of the soil (taught separately) were performed, and when a pit was dug and tested again the water swirled clockwise.
Exact words of the pit-test mantra: refer to the class recording.