If by "dirt" you mean the sand, soil, rock and other matter that make up the earth's crust, the person studying this would be a geologist.
soil scientist
There are three primary components of soil ("dirt"): Sand, Silt, and Clay.
The study of dirt is called pedology. It involves the examination of soil in its natural environment to understand its properties, formation processes, and interactions with the surrounding ecosystem.
Planting or burying something in the ground and covering it with dirt is called "burying" or "planting."
The dirt or topsoil carried by running water is called sediment.
They are called geologists.
An insect scientist is called an entomologist.
lunar dirt
a dirt clod
There is a scientist called Dr Mahendra Verma.
A scientist who studies insects is called an "entomologist".
A scientist who studies mollusks is called a teuthologist.
A scientist that studies bats is called a chiropterologist.
A scientist is someone who studies science.
An "animal scientist" is called Zoologist .
There are three primary components of soil ("dirt"): Sand, Silt, and Clay.
The study of butterflies and moths is called Lepidopterology. Butterfly scientist = lepidopterologist. :)
A "moth scientist" is known as a lepidopterist.