Tritium (T.U.) Loose Bound Area Cactus Crater Runit Island Engebi Island Sanildefonso Island Mike Crater area Japtan Island Igurin Island 509 +30 MC (A%) 3.54 10% 2920 +65 <60 <=60 3.68 x 10° 7.50 x 104 1110 + 30 840 + 23 <50 3.44 x 105 2545 <50 3.00 x 104 ~4042 Table 8. 44C content ofplants on Runit, Engebi and Sanildefonso Islands MC (A%) Sample and area Wood Cactus Crater, Runit Island Messerschmidia argentea, inner growth rings outer growth rings Lepturus repens Messerschmidia argentea Scaevolafrutescens Sanildefonso Island Messerschmidia argentea Lepturus repens Triumfetta procumbens Soil 59 +4 12546 20447 2920 + 65 78 +5 Triumfetta procumbens Engebi Island Litter 7645 102 +5 134 +6 8746 Japtan Island Messerschmidia argentea Pisonia grandis 4444 $145 7545 6045 5844 1110 + 30 7) 44 5744 70+4 840 + 23 102 +5 7845 Wood 5445 Messerschmidia argentea 1644 Pisonia grandis Cocos nucifera Biijiri Island Messerschmidia argentea Aaranbiru Island Messerschmidia argentea Pisonia grandis Guettarda speciosa * Younglitter. t Old litter. Fruit 74+4 344 Ochrosia oppositifolia Igurin Island will be r sated wate ale “ar plant Vhough isotoy1 ls yarious leve ¢ chal regulate stants: RANEY pl ‘ened with hose relations! edeuterated (1 ir wnto and with . 8 tritiated Ho the following qutrient soluti plant tissues: 2441 4144 §=54+4 -6+3 3444 MC (4%) Leaves Litter / 69 +5 784+5* 70 + 4t 6445 Stem Leaf veir Mesophy The stem ofth Table 9. ¥4C content ofplants on Japtan, Biijiri, Igurin and Aaranbiru Islands Sample and area wot Tissue 69+5 Scaevola frutescens Leaves one sagt Table 7. Soil-bound sources of tritium and 4C at Eniwetok Atoll ee amen PERSISTENCE OF TRITIUM AND “C IN THE PACIFIC PROVING GROUND pmeetinenstaceetartafin getBhat Peme seis OareABehT BY eo om | 1452 Soil demonstrated sunflower plan was shown to the root solutio plants, at least absorption of ti the shoot tissuc zone. This ra demonstrated Phaseolus vulgai per cent of th nutrient solu tritium in all s 2545 cent of the nut According t equilibration ( tion THO cor inflow of unlal and the dilutic root system | Tespiration in growth cham] gave THO lev equilibrium (£ concentration. Studies by VaapiaAlanc have produce: