Figure 1: Uranium and Thorium content (BqKg-1 dry weight) in the edible portions of the four study crop plants Eruca sativa (Es), Lycopersicum esculentum (Le), Psidium guajava (Pg) and Mangifera indica (Mi) cultivated in the coastal black sand and in the inland sites. Vertical bar around the mean is the standard deviation. Different superscript stars for the same species indicate significant differences, *** significant at P≤0.001; ** significant at P ≤ 0.01 and * significant at P ≤ 0.05.