Biology — Nitrogen Cycle
Fixation, nitrification, assimilation and denitrification steps.
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digraph NitrogenCycle {
rankdir=LR;
node [shape=box, style=rounded];
"N2 (atmosphere)" -> "Ammonia" [label="N-fixation"];
"Ammonia" -> "Nitrites" [label="nitrification"];
"Nitrites" -> "Nitrates" [label="nitrification"];
"Nitrates" -> "Plants" [label="assimilation"];
"Plants" -> "Animals" [label="feeding"];
"Animals" -> "Ammonia" [label="decomposition"];
"Nitrates" -> "N2 (atmosphere)" [label="denitrification"];
}