Fen
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A fen is a type of peat-accumulating wetland fed by mineral-rich ground or surface water. It is one of the main types of wetland along with marshes, swamps, and bogs. Bogs and fens, both peat-forming
Avaste Fen, Estonia. Sedges dominate the landscape. Woody shrubs and trees are sparse.
Wicken Fen, England. Grasses in the foreground are typical of a fen.
Spaulding Fen, Wisconsin
Small extreme rich fen in southwestern Minnesota. The white flowers, Parnassia glauca, are a fen indicator species in Minnesota.
Nitrification
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Nitrification is the biological oxidation of ammonia to nitrate via the intermediary nitrite. Nitrification is an important step in the nitrogen cycle in soil. The process of complete nitrification ma
Nitrification process tank at a sewage treatment plant