There are 4 layers in soil. (layer in soil called horizon)
1. Organic layer means the top layer of the soil, especially in forest and grassland. There is a little bit of dirt mixed in.
2. Topsoil, in this horizon organic and minerals are well mixed
3. Subsoil, there is more water in this horizon and there are very little organic material but a lot of nutrient.
4. Little weathering, in this horizon it is almost rock like.
Soil Properties