
%0 Journal Article
%A Hailes, K. J. 
%A Aitken, R. L. 
%A Menzies, N. W. 
%T Magnesium in tropical and subtropical soils from north-eastern Australia. II. Response by glasshouse-grown maize to applied magnesium
%J Soil Research
%D 1997/05/06
%V 35
%N 3
%P 629-642
%K critical concentration, critical soil test, deficiency, Zea mays.
%R https://doi.org/10.1071/S96082
%U https://www.publish.csiro.au/paper/S96082 
%X A glasshouse trial, in which maize (Zea mays L. cv. Pioneer 3270) was grown in 35 north-eastern Australian soils of low magnesium (Mg) status, was undertaken to study the response to applied Mg. Of the soils studied, 20 were strongly acidic (pH1:5 soil : water &#60;5&#183;4), and in these soils the response to Mg was studied in both the presence and absence of lime. Magnesium application significantly (P &#60; 0&#183;05) increased dry matter yield in 10 soils, all of which were strongly acidic. However, significant Mg responses were recorded in 6 soils in the presence of lime, indicating that, in many situations, liming strategies may need to include consideration of Mg nutrition. Critical soil test values for 90% relative yield were 0&#183;21 cmol(+)/kg of exchangeable Mg or 7% Mg saturation, whilst the critical (90% yield) plant tissue Mg concentration (whole shoots) was 0&#183;15%. 
