Question

unification of various types of soil regonition and its utility

Answer 1

In terms of soil texture, soil type usually refers to the different sizes of mineral ... such as pure clay. There are many recognized soil classifications, both international and national 

Answer 2

The three main types of soil are - sand, slit, and then clay.

Sand are tiny particles of some weathered rocks, slit can be understood as the finest versions of the sand.

While clay is the finely grained sand.

Based on their texture, they are used in different kinds of purposes.