Question

topsoil and subsoil define​

Answer 1

Answer:

Topsoil is the upper, outermost layer of soil, usually the top 5–10 inches. It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs. Topsoil is composed of mineral particles, organic matter, water, and air.

Subsoil is the layer of soil under the topsoil on the surface of the ground. It is composed of a variable mixture of small particles such as sand, silt and clay, but with a much lower percentage of organic matter and humus.

Answer 2

Answer:

Subsoil. Subsoil is the layer of soil under the topsoil on the surface of the ground. Like topsoil it is composed of a variable mixture of small particles such as sand, silt and/or clay, but with a much lower percentage of organic matter and humus. Below the subsoil is the substratum, which can be residual bedrock, sediments,...

topsoil. : surface soil usually including the organic layer in which plants have most of their roots and which the farmer turns over in plowing.