The A horizion
The layer of soil that has little or no humus in it is the subsoil. The top layer of the soil has the most humus in it because the dead leaves fall from the plant and go back into the soil. Water and sun also help give the plant humus.
all i know the three types of soil are top soil sub soil and bedrock
they get humus, all of the soil will die.
Dead and decayed remains of plants and animals, called 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)
humus
humus soils
soils have different layers present in it as the depth increases. These layers are called horizons. Humus as we all know is present in the top layer of the soil,which is several inches in thickness and is called A horizon.
The topsoil layer and the organic matter layer are likely to contain humus. Humus is a dark, organic material that forms from the decomposition of plant and animal matter, enriching the soil with nutrients and improving its structure and fertility.
you are likely to find dark, humus-rich soil in an A-horizon profile because that's where dark soil is found & the composition is the particles of weathered rock materials mixed with humus.
how does the presence of humus affect soil
The soil type in the Amazon Basin is predominantly nutrient-poor and acidic. It is known for its high levels of clay and humus, which provide some fertility but are prone to erosion. The region's biodiversity is adapted to these challenging soil conditions.