Table 3. mee SIEO00S ee Composition of coral soil profiles from Bikini and Eneu Islands. Total@ Istand location and depth — (cm) Bikini No. 0-5 7.7 5-10 7.8 15-25 25-40 7.9 8.3 10-15 40-60 tl pH Bikini No. 0-5 5-10 10-15 15-40 Eneu No. 0-5 5-10 10-15 | 15-25 25-40 40-60 7.9 Sr (Z) 0.38 0.39 0.39 0.40 0.39 Ca (2) 30.4 30.8 30.9 34.5 7.8 8.0 0.40 0.40 31.0 32.4 7.7 8.0 8.0 8.4 8.7 8.9 0.32 0.34 0.31 0.28 0.28 0.30 0.95 0.89 0.89 0.86 1.28 0.3) 0.38 0.38 (%)— 31.9 34.3 8.4 7.9 8.2 Mg 33.3 34.7 32.0 32.6 34.3 34.0 34.4 33.3 pe (%) 1.35 1.28 1.29 N (%) Organic Extractable (%) (ppm) matter? 0.64 0.62 0.63 14.4 13.2 12.3 Ke 79 26 20 2.05 1.17 0.67 0.16 0.50 0.19 10.6 4.5 23 4 1.02 1.09 0.82 0.71 0.49 0.46 10.7 8.5 50 24 1.18 1.79 1.74 1.76 2.08 2.40 2.48 2.37 0.56 0.32 0.085 0.055 0.037 0.016 0.014 0.015 0.11 0.35 40.1) 0.30 0.35 0.17 0.06 0.05 0.03 1.6 7.4 1.6 24 6 5.1 41 5.6 2.6 0.9 0.8 0.6 4 Stable cesium was below detection limit (1.3 ppm). D pH in water. € High phosphorus values indicate ancient guano deposition. d Organic matter by wet oxidation. © Extractable in N ammonium acetate. 3 20 9 1 1 cd Cation exchange Particles sized Meq/100 g (%) capacity 60 60 57 50 24 12 ° 28 42 <O.5 mm 11.5 9.5 11.7 6.3 0.6 5.7 3.7 38 14 3.3 1.4 23 2.3 25 14 8 8 6 1.6 0.8 0.3 0.2 0.1