Manganese black spots in soil
by Antonio Jordán, University of Seville, Sevilla, Spain
Manganese oxide causes black spots in soil. In the picture, hydrogen peroxide is used for determining the presence of manganese oxide in an aggregate of soil by effervescence.
Taken on 4
Submitted on 17 September 2013
Credit: Antonio Jordán (distributed via imaggeo.egu.eu)
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