anthropic horizon The surface horizon of a mineral soil which is produced by very long periods of cultivation and fertilization by humans. It is dark brown in colour, contains at least 1 per cent organic carbon, is relatively deep (more than 50 cm), has a base saturation of more than 50 per cent, and has more than 250 ppm P₂O₅ soluble in 1 per cent citric acid.

anthropic horizon The surface horizon of a mineral soil that is produced by very long periods of cultivation and fertilization by humans. It is dark brown in colour, contains at least 1 per cent organic carbon, is relatively deep (more than 50 cm), has a base saturation of more than 50 per cent, and has more than 250 ppm P₂O₅ soluble in 1 per cent citric acid.