No. Soil color is influenced by the amount of proteins present in the soil. Yellow or red soil indicates the presence of iron oxides.[1] Dark brown or black colour in soil indicates that the soil has a high organic matter content. Wet soil will appear darker than dry soil. [1] However the presence of water also affects soil color by affecting the oxidation rate. Soil that has a high water content will have less air in the soil, specifically less oxygen. In well drained (and therefore oxygen rich soils) red and brown colours caused by oxidation are more common, as opposed to in wet (low oxygen) soils where the soil usually appears grey. The presence of specific minerals can also affect soil color. Manganese oxide causes a black color, glauconite makes the soil green, and calcite can make soil in arid regions appear white. http://www.google.com/url?sa=t&rct=...-YCwBg&usg=AFQjCNEa8XKu0IP9JMa1ctWFDWArfeSHUg
Yes, carbon like charcoal and carbon black can give soil a blackened color. It is not the ONLY thing that can, but it certainly can. Look up "Terra Prieta" in wikipedia. http://en.wikipedia.org/wiki/Terra_prieta
It's terra preta, not prieta. It's the Portuguese word for "black." Many people misspell it because they think it's Spanish, so Wikipedia captures the inquiry and redirects it to the correct page.
I found a new study by Germans , who point out that charcoal and carbon end up in the ocean , which is contrary to common believe .
That is true, but the URL of the Wiki page is Terra Prieta. I didn't title it, I just told him where to look.
