the total leaf surface area exposed to incoming light energy, expressed in relation to the ground surface area beneath the plant (e.g. an LAI of 4 means that the leaf area exposed to light is 4 times the ground surface area).
ratio of the canopy leaf area to its projected surface area on the ground
Additional optional information can be collected, which is useful for the interpretation of the results, such as canopy roughness, leaf area index etc.
