
%0 Journal Article
%A Manu, VT 
%A Kipton, H 
%A Powell, J 
%A Banks, L 
%A Sheat, A 
%A Widdowson, JP 
%T Accession of SO<sup>2-</sup><sub>4</sub> sulfur from Tongan rainfall
%J Soil Research
%D 1990/10/01
%V 28
%N 5
%P 727-736
%K 
%R https://doi.org/10.1071/SR9900727
%U https://www.publish.csiro.au/paper/SR9900727 
%X Accession of SO42- S from rain in Tonga has been assessed as approximately 6 kg S ha-1 year-1 from analysis of rainwater collected at three sites on two islands over a period of 365 days. The accession is of similar magnitude to crop removal of soil S. This accounts for the absence of S deficiencies in crops grown on andesitic soils which, on the basis of low to very low levels of adsorbed sulfate and low plant yields in glasshouse trials, were considered S-deficient. From consideration of ion ratios, it was established that sea spray/marine aerosol is the major source of SO42- S in Tongan rainwater. 
