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![Studies of leaf water content in smart agriculture using THz technologies: a review](https://image.oaes.cc/120f7a4f-a9a4-4b88-8e1a-d941b4f44760/4926.fig.9.jpg)
Figure 9. Transmission values of different leaves on days 1 (A) and 4 (B)[9]. Observing the graphs it is evident that on the first day, the absorption of the leaves was high due to a greater quantity of water present in the leaves showing how at these frequencies the water heavily absorbs this type of radiation; On the contrary, after four days, however, there is a gradual increase in the transmission values, a phenomenon explained by the evaporation of the water inside the leaves.