Table I. 9 0 Sr and 137 Cs in typical samples from Inari, Finnish Lapland in summer 1969 (5) ash Sample Habitat 205), % of |ne/g ne/ke| dry |Ca dry wt Cladonia lichens (80% Cl.alpestris) 15los ne/g K wt ne/ke dry | wt regio sub- alpina 2.8 2.3 [4.2 130.0 34.0 Wild grass wet meadow 5.0 [0.15 |0.26 0,27[ 3.8 Horsetail (Eq.Fluviatile) Lake 13.7 [0.07 |0.85 0.05] 1.1 Sedge (Carex aquatilis) river 5.4 10.10 }0,26 0.19} 2.3 Cowberry (V.vitis idaea) forest ‘Bel [0.13 0.73 1.20] 4.2 Dwarf birch (Betula nana) leaves hill top 2.4 10.26 10.84 O.44] 1.9