How to construct a Test area for LRLs

[Geo]

Hi.
Before 2 days i made a test area for LRL. I made it with mercury!!!!
I believe the "phenomenon" to be ready after 2...3 months.
Sorry for bad quality of photos, but i took them with my mobile.
First i opened a hole at 35 cm depth and about 35...40 cm diameter.
I put inside the hole a platter from glass. I filled the platter with soil and i threw the mercury inside the platter.
I closed the hole with the soil and the test area is OK.

Regards