The Fertile soil contains lots of microorganisms which decompose the complex dead bodies of animals and plants into simpler substance called Humus.
Humus is decayed plants & animals
no it is found in the topsoil or a horizon
Well, the A horizon is made up of topsoil, a crumbly, dark brown soil composed of humus, clay, and other minerals.
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 C and R horizon
Soil is composed of organic and inorganic parts. Inorganic is weathered rock. Organic is dead or decaying organisms called humus. Fallen leaves are part of what makes up humus. Fallen leaves (as well as all humus) are found in the "O" horizon as well as the "A" horizon.
the O-Horizon is the topmost soil so it has the most humus
In soil, water seeps through the A horizon and reacts with humus and carbon dioxide to form acid .
The uppermost layer of the soil which is the O-horizon, and is called "Humus".
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.
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.
Humus
AnswerThe O horizon and the A horizon are most rich in humus due to the organic material being highest in those two layers. O is higher than A, though. mjhgbb