Placic horizon | Article about placic horizon by The Free Dictionary
placic horizon[′plā·sik hə′rīz·ən]
A black to dark red soil horizon that is usually cemented with iron and is not very permeable.
References in periodicals archive
The New Zealand Soil Classification (Hewitt 1998) classifies the 4 soil series, derived from mineral parent material, on the basis of differences in drainage condition plus differences in acidity and the presence of a placic horizon
and a peaty topsoil.