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how does the presence of humus affect soil
Anywhere from "none" to "lots and lots". Calcareous soil is soil high in calcium (lime) content. it has nothing to do with the percentage of humus, which is decayed organic material.
"Humus is in soil," "the humus levels were high," Did I answer your Question?
fertility
fertility
Vegetation rots down and creates humus which improves soil structure.
It is called humus.
humus is a source of nutrients which makes soil fertile.
Humus was added to it
Of course it does! Humus is made of dead stuff and orginc matter and this helps the soil add more nutrients.
The organic matter in soil is called humus.
the two layers are sub soil 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.