humus group - Territorio e Sistemi agro-forestali - Università degli ...
humus group - Territorio e Sistemi agro-forestali - Università degli ...
humus group - Territorio e Sistemi agro-forestali - Università degli ...
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10<br />
90<br />
Figure 2<br />
70%<br />
30 %<br />
OL OF OH<br />
% volume roots excluded<br />
OL – OF - OH<br />
30<br />
70<br />
HUMIC COMPONENTS (HC) = Small particles<br />
of organic remains and/or grains of organic or<br />
organo-mineral matter mostly comprised of<br />
animal droppings of different sizes. The<br />
original organs which compose the litter and<br />
generate the small particles (free or<br />
incorporated in animal faeces) are not<br />
recognizable by the naked eye or with a 5-10 X<br />
magnifying hand lens. Bound mineral particles<br />
can be visible within the mass. Well<br />
decomposed organic substrate is generally<br />
100% humic component. However, the<br />
generated humic component can also be in the<br />
hemorganic (A) and organic (OL, OF, OH)<br />
horizons.<br />
RECOGNIZABLE REMAINS (RR) = Organic<br />
remains like leaves, needles, roots, bark, twigs<br />
and wood, fragmented or not, whose original<br />
organs are recognizable by the naked eye or<br />
with a 5-10 X magnifying hand lens. Fresh litter<br />
is generally 100% recognizable remains.
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