Question

what is sub soil?? how much water does it retains??
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Answer 1

Explanation:

noun: sub-soil

1.

the soil lying immediately under the surface soil.

verb

verb: sub-soil

1.

plough (land) so as to cut into the subsoil.

"to gain maximum benefit from subsoiling this operation needs to be done when the lower levels of the soil are relatively dry"

Answer 2

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 clay, but with a much lower percentage of organic matter and humus.