Correlation coefficients between nutrients concentrations in grain of winter wheat grown at different soil N fertilizer rates and foliar fertilizer applications at Yangling during 2010–2014 and Sanyuan during 2012–2014.

<p>Correlation coefficients between nutrients concentrations in grain of winter wheat grown at different soil N fertilizer rates and foliar fertilizer applications at Yangling during 2010–2014 and Sanyuan during 2012–2014.