
%0 Journal Article
%A Moody, P. W. 
%A Dickson, T. 
%A Aitken, R. L. 
%T Soil phosphorus tests and grain yield responsiveness of maize (<emph type="2">Zea mays</emph>) on Ferrosols
%J Soil Research
%D 1997/05/06
%V 35
%N 3
%P 609-614
%K corn, oxisols.
%R https://doi.org/10.1071/S96103
%U https://www.publish.csiro.au/paper/S96103 
%X The grain yield response of maize (Zea mays) to various rates of applied phosphorus (P) was measured at each of 17 sites in the South Burnett region of south-eastern Queensland. The soils at all sites were Ferrosols. Relative grain yield of the nil applied P treatment &#91;100 &#215; (yield at nil applied P/maximum yield)&#93; was related to Colwell (0&#183;5 M NaHCO3) extractable P (PB), CaCl2-extractable P, and equilibrium P concentration and P buffer capacity calculated from P sorption curves. Of these P measurements, PB was most highly correlated with relative grain yield (R2 = 0&#183;94 for a linear response and plateau fit, R2 = 0&#183;92 for a Mitscherlich fit), and the PB values at 90% maximum grain yield were 20 mg/kg for the linear response and plateau model and 32 mg/kg for the Mitscherlich equation. 
