The vertical sequence of the layers of soil is called a soil

Soil profile
Soil profile is the vertical sequence of the layers of soil. Furthermore, there are actually six layers of the soil which involves the organic matter, -where most humus is present-, surface soil, the subsoil, the parent rock, and the bedrock as the innermost and core layer of the soil. In addition each soil layer has three to four soil horizon. These horizons are the physical features of the soil, mainly the texture, color and composition.

Although the diagram is not shown, i know that the convection is heated by a the core.

Well to my expert knowledge and my exquisite calculations i think the the negative ion # 412 is the key to sucess