In this second video we are going to see some characteristics of the soil organic matter.
BIOGEOCYCLING. Fallen parts of plants (tree trunks, leaves, branches, flowers, fruits...) and dead animals form the necromass on forest ground. We can observe three layers in this necromass: 1) Parts of plants not yet decomposed; 2)Partially decomposed; 3) Mostly decomposed and mixed with soil particles making up the humus. And under the necromass we find root mats. Root mats are typical of rain forests on extremely infertile soils like this oxisol of the Atlantic Forest. These roots absorb minerals that are leached out of the decomposing leaf litter or necromass. These plant roots are naturally infected with endomycorrhizal fungi which increase the absorption capacity of the roots.
These root mats and organic matter in decomposition are concentrated on top 10cm of the soil.
Believe it or not! The soil richness of the Atlantic Forest is on the top 10cm or so!!!
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