by earthworms in it
topsoil
topsoil
Yes topsoil has more fertility and humus than subsoil.
Topsoil typically has the largest particle size among humus, subsoil, and topsoil. This layer is the uppermost layer of soil and is composed of a mix of organic matter, minerals, and nutrients. Humus is a component found within topsoil that is made up of fully decomposed organic matter, while subsoil is found beneath the topsoil and can have a finer texture due to lower organic content.
by earthworms in it
by the way there are sunlight in human and in soil. ************ Topsoil will contain more humus (notice the spelling!) than subsoil. Topsoil is the layer where most household gardening and food production on farms takes place. The subsoil could be solid clay, which would make the topsoil rather wet after a heavy rain. Or even solid bedrock, with a thin layer of topsoil on top - not really suitable for growing deep rooted plants.
the O-Horizon is the topmost soil so it has the most humus
3 layers of different kinds of soil is you count humus,5, (humus, topsoil, midsoil, poor soil, bedrock, you can call it 3 though, humus isn't actual soil its dacayed plants and animals)
The layer of soil lacking humus and fertility is called the subsoil. Subsoil is usually low in organic matter and nutrients, making it less suitable for plant growth compared to topsoil. It often requires amendments or management practices to improve its fertility.
no it is found in the topsoil or a horizon
topsoil is near the roots of trees and subsoil is underneath the roots of trees
humus