EN
The research referring to the content of exchangeable Al was localized in the Carpathian beech forest of the Bieszczady National Park, complex Rawka. Acid brown soils were characterized by very low pHKCl, high exchangeable and hydrolitic acidity. The content of exchangeable Al [from 3,65 to 8,27 cmol (+) kg⁻¹ of d.m.] was highest in Ah and AhBbr chorizons. The participation of exchangeable Al in exchangeable acidity was highest in deepest, Bbr and BbrC horizons.