Fig. 3
Illustration of the foliar feeding treatment in wheat plants, where the green circle represents chlorophyll in the flag leaves, the blue circle indicates the presence of nitrogen, and the yellow circle represents the applied 15N-urea solution. Dark arrows mean high absorption rate while light one mean low absorption rates. This treatment allows for rapid absorption of nitrogen through the leaf surface, facilitating translocation to other parts of the plant during late growth stages. The spike numbers reveal the fraction of absorbed 15N that was remobilized to the grain, not the overall spike nitrogen buildup.
