EN
The characteristic of hydrogenic sites and soils in Narew river valley from Suraż to place of confluence Biebrza and Narew rivers are presented. The way of occurrence of hydrogenic sites and soils is differentiated in the valley. Between Suraż and Rzędziany village the valley is paludified. Peatlands with swamped peat soils prevail here. Only in vicinity of Suraż and Uhowo occur slightly moorshed peat soils, silted sites and on the edges of peatlands - moistlands, which occupy narrow belts in the transition zone from wetlands to a not paludified terrain. From Rzędziany to Tykocin the valley is transformed by human activity and for the most part reclaimed and brought into cultivation. The peatlands with moorshed peat soils (MtI, MtII, and MtIII in places) dominate here. Among the peatlands the great number of mineral islands and moistlands with the soils in the decesion (loss) phase occur. There is transitional zone between Tykocin and Łazy, where the hydrogenic sites changes its character from peatlands to alluvial ones. The alluvial soils are situated in narrow riverside belt in close vicinity of river, peatlands occupy the places close to valley-side. Beneath Łazy village the alluvial soils prevail in the valley.