Fig. 1.

Distribution of ⁶⁵Zn in leaves following foliar application of ZnEDTA and ZnSO₄. The calculated mass of ⁶⁵Zn in each leaf fragment is presented as the mean percentage (±1SD, n=4) of the total mass of ⁶⁵Zn in the leaf (i.e. the total of all columns equals 100%). The asterisk indicates a significant difference between ZnEDTA and ZnSO₄ for that leaf fragment (P=0.0009); NS, not significantly different. Statistical tests could only be applied to the first three leaf fragments (i.e. application area of 6 mm) due to unequal sample sizes for the remaining fragments as ⁶⁵Zn was below the detection limit in some samples. Therefore, statistical tests would not be conclusively, or reliably, detected. The first bar represents the 20 mm of leaf tip that was dipped in fertilizer. Error bars are not shown for leaf fragments where ⁶⁵Zn was only detected in one or two of the four replicates.