11 Table III. Composition of representative soil types from Rongelap Atoll (after Kemady 1962), Kabelle Sand, a young soil Soil Depth - inohes Per Cent Material —> 2 mm £ nent Per Cent Nitrogen Per Cent Organic Matter Exohange Capacity 0-1] 34 0,22 8.1 6.3 1-11 8 0.02 ~~ 0.3 Sodium 1.57 3.01 Magnesium 1.37 1.04 Caloium 3.01 Potassium Phosphorus pH 0. 57 (ppm) 30.0 8.9 © 2.68 Oo 15 12.0 941 11-38 2 0.01 2.6 0.1 1.37 1.16 2.65 0,20 12.0 9.2 Lomuilal Sand, an old soil anit Soil Depth - insheas Per Cont Material >> 2 me Per Cant Nitrogen Per Cent Organio Matter Exchange Capacity Soditun Magnesium Caloium Potassium Phosphorus (ppm) pH 0-3 0 0.29 2.8 14.2 2.73 4.66 5.02 1.09 105.9 8.4 3-10 10-12 5 0.07 2.3 2.3 0.73 8.36 1.87 0.18 15.1 8.6 18 0.08 2.2 2.6 0.82 1.05 2.50 0.19 14.1 8.3 12-21 21 48 12 0.04 1G lel 0.82 0.85 2.31 0.16 5.0 8.8 2 0.02 1.7 0.6 0.84 0.83 2.35 0.16 5.0 9.1 Gogan Gravelly Sandy Loam, an old soil Soil Depth - inehes * Re E Per Cont Material —> 2 mm Per Cent Nitrogen Per Cent Organio Matter Exchange Capacity Sodium Magnesium Caloium Potassium Phoaphorus (prin) pH * 10 0-1 1-5 5-12 12-20 20-26 10 1.54 20 1.96 20 0.42 27 0.18 39 0,07 56 0.05 21.4 20.5 2.0 -43.6 9.0 549 17.9 0.8 6.8 Fe2 0.4 2.6 2.6 o.4 246 1.7 0.4 740 74 4.0 2.2 1.2 1.1 10.3 24,2 14.1 6.2 Fef 7.8 1990.4 892.8 415.5 216.3 150.6 2541 74 Fel 79 8.2 8.6 8.8 -- 1.80 -- ~o -- -- meq per 100 gm dry soil nay are! , 4 np, Tt Vit