Question

which is the bottom layer of soil profile​

Answer 1

${\huge {\underline {\purple {\mathbb{ANSWER}}}}}$

Below the topsoil is the subsoil, also called the B horizon. The subsoil contains clay and iron oxides washed from the topsoil. The bottom layer, also called the C horizon, is composed of rock fragments of weathered parent material.

Answer 2

Answer

R Horizon - The bottom most layer of soil is the unweathered rock (bedrock) layer that is beneath all the other layers.