Background and aimsIncreasing both yield and grain zinc (Zn) concentration (GZC) are the two important goals of maize production in China and elsewhere in the world. However, it is not clear whether soil application of Zn fertilizer could realize high yield and GZC. The current study aimed to examine how soil Zn application affects yield and GZC and what is the optimal DTPA-Zn for high yield and GZC requirement.