What is baseball dirt called?

Infield mix is the official term of the dirt found in the infield of a baseball field.  However, people call it baseball dirt or baseball clay.  Product names like DuraEdge®, Turface®, Beam Clay®, and AMP® refer to different types of infield products.  River Sand, Inc.’s brand of infield mix is AMP® or Accu-Mix-Plus® which refers to the custom, precision blend of sand to clay that we provide in our infield mix.