
%0 Journal Article
%A Palmer, B 
%A Bolland, MDA 
%A Gilkes, RJ 
%T A re-evaluation of the effectivenes of calcined Christmas Island C-grade rock phosphate
%J Australian Journal of Experimental Agriculture
%D 1979/10/01
%V 19
%N 100
%P 605-610
%K 
%R https://doi.org/10.1071/EA9790605
%U https://www.publish.csiro.au/paper/EA9790605 
%X The influence of calcination temperatures up to 1050°C on the effectiveness of Christmas Island C-grade ore was determined in glasshouse trials with wheat. All calcines were capable of supporting the same maximum yield. Maximum effectiveness, equivalent to one-third that of superphosphate, occurred for calcination temperatures between 450°C and 600°C. Re-evaluation of the results of other workers indicated that a similar value for relative effectiveness applies to their work on a variety of species. 
