11 Table III. Composition of representative soil types from Rongelap Atoll (after Kermady 1962). Kabelle Sand, a young soil Soil Depth - inohes Per Cent Material ~> 2 mm Per Cent Nitrogen eee HH Per Cent Organic Matter Exohange Capacity Sodium Magnesium Caloium Potassium Phosphorus (ppm) pH 0-1 3h 1-11 8 11-38 2 0.22 0.02 0.01 6.3 1.57 0.3 3.01 0.1 1.37 1.04 1.16 8.1 3.01 0.57 30.0 8.9 -- 2.88 0015 12.0 9.1 2.6 1.37 2.65 0.20 12.0 9.2 Lomuilal Sand, an old soil Soil Depth - inches Per Cent Material >> 2 mm eHhED RH Per Cant Nitrogen Per Cant Organio Matter Exchange Capacity Sodium Magnesium Caloium Potaasium Phosphorus (ppm) pH 0-3 0 3-10 L0-12 5 18 0.29 2.8 0.07 2.3 2.73 4.66 5.02 1.09 105.9 0.73 8.36 1.87 0.18 15.1 0.82 1.05 2.50 0.19 14.1 8.6 8.3 14.2 8.4 2.3 0.08 2.2 2.6 12-21 12 21-48 2 0.04 1.9 0.02 1.7 0.82 0.85 2.31 0.16 5.0 0.64 0.83 2.35 0.16 5.0 8.8 9.1 1.1 0.6 Gogan Gravelly Sandy Loam, an old soil Soil Depth - inches a Per Cent Material -> 2 m 1~ 10 Ou] 20 1-5 20 Per Cent Nitrogen Per Cent Organis Matter Exohange Capacity 1.54 21.4 20.5 1.96 -43.6 0.42 5.9 17.9 Magnesium Caloium 7.0 10.3 7.4 24.2 4.0 14.1 1330.4 892.8 74 Fel Sodiun Potassium Phosphorus (ppm) pH * meq per 100 gm dry soil 2.0 -- 3.0 1.80 0.8 5-12 27 0.18 6.8 72 0.4 12-20 20-26 39 56 0.07 2.6 2.6 0.4 0.05 2.6 1.7 0.4 2.2 6.2 1.2 707 1.1 7.8 415.5 216.3 150.6 25.1 709 8.2 8.6 8.8 -- -- -- --