RESULTS Regrowth of the Land Plants at Belle Island The gamma survey~-meter readings taken at Belle Island during the period of investigation are given in Table 1 and in Figure 3, which includes the theoretical gamma dose rate according to Miller and Loeb (17) ana the slope for evi. 2, The accumulated total dose from one minute after the detonation to the end of 200 days was calculated to be approxi- mately 400 r. Before the Nectar detonation, the plants on Belle Island were generally green and healthy-looking. general area taken at this time appearance of the vegetation. ing of the leaves and necrosis, Guettarda, (Fig. 4a) shows the healthy In some plants there was yellow- especially in Scaevola and and some reddening of the tops Lepturus repens. A photograph of the of the grass, The latter symptom is typical of some species of plants growing in phosphorus-deficient soil, a condition often found on coral atolls and in areas where the top soil has been disturbed or blown away. The Mike detonation of 1952 had removed most of the plants and top soil from Belle Island, re- sulting in the depletion of some of the elements essential for plant growth. In spite of these deficiencies regrowth of the