Fig. 3From: Tracing radioactive cesium in stem wood of three Japanese conifer species 3 years after the Fukushima Dai-ichi Nuclear Power Plant accidentRadial distribution of element (activity) concentration in wood sampled at different vertical positions in 2014. a–d137Cs, e–h133Cs, i–l85Rb, m–p39K. ND letters indicate that 137Cs activity in the samples was under the detection limit and show the detection limit values. SW sapwood, HW heartwoodBack to article page