Genotypic difference in rice yield and zinc partitioning in rice grain response to different Zn<sup>2+</sup> activities Iron and Zinc Contents in Shandong Wheat Landrace Partitioning and Accumulation of Zinc in Rice under Different Zn2+ Activities Efficacy of propineb for controlling leaf blotch caused by Marssonina coronaria and its effect on zinc content in apple leaves Accumulation of copper and zinc in soils under different agricultural and natural field