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 dirt or topsoil carried by running water is called sediment.
Planting or burying something in the ground and covering it with dirt is called "burying" or "planting."
The study of dirt is called pedology. Pedology is a branch of soil science that focuses on the formation, classification, and mapping of soils in their natural environment. It involves examining the physical, chemical, biological, and mineralogical properties of soil to understand its composition and how it influences plant growth and ecosystem dynamics.
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.
An "animal scientist" is called Zoologist .
A scientist that studies bats is called a chiropterologist.
A scientist is someone who studies science.
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.