
%0 Journal Article
%A Bruce, RC 
%A Bruce, IJ 
%T Correlation of soil phosphorus analyses with response of tropical pastures to superphosphate on some north Queensland soils
%J Australian Journal of Experimental Agriculture
%D 1972/04/01
%V 12
%N 55
%P 188-194
%K 
%R https://doi.org/10.1071/EA9720188
%U https://www.publish.csiro.au/paper/EA9720188 
%X From the results of twenty-one field experiments dealing with the establishment of tropical pastures, correlations between per cent yield and soil phosphorus analyses showed significant relationships for the Kerr- von Stieglitz and Colwell methods but not for the Bray P2 method. To separate responsive and non responsive soils critical values of 17.5 p.p.m. P for the Kerr-von Stieglitz and 20 p.p.m. for Colwell methods are proposed. Correlations with the main Chang and Jackson soil phosphorus fractions are reported and discussed. 
