Mineralogy and radioactivity of Niue Island soils

Results of X-ray, D.T.A., magnetic, and radioactivity examinations of Niue Island soils (from samples collected in 1949) are given and problems of soil origin and agriculture are discussed. The mineralogy of the soils is unusual and they show considerable natural radioactivity. These soils have silicon contents of less than 1 % and average phosphorus content of about 1 % .