Leptosol

A leptosol (LP) can be defined through :

• a limit in depth by continuous hard rock within 25 cm from the soil surface

or :

• overlying material with a calcium carbonate equivalent of more than 40 percent within 25 cm from the soil surface

or :

• less than 10 percent (by weight) fine earth to a depth of 75 cm or more from the soil surface

and :

• no diagnostic horizons other than a mollic, ochric, umbric, yermic or vertic horizon

Source

• The FAO website