Question

Black soils are dark grey to black in colo with high clay content. Why?​

Answer 1

Answer:

Soil color is produced by the minerals present and by the organic matter content. Yellow or red soil indicates the presence of oxidized ferric iron oxides. Dark brown or black color in soil indicates that the soil has a high organic matter content. ... The presence of other minerals can also affect soil color

Answer 2

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Soil color is produced by the minerals present and by the organic matter content. Yellow or red soil indicates the presence of oxidized ferric iron oxides. Dark brown or black color in soil indicates that the soil has a high organic matter content. The presence of other minerals can also affect soil color.