Task: Class Definition Understanding (ontology: Food_Agriculture/Crop_Ontology)

Which of the following definitions best describes 'Leaf stomatal conductance'?

A. Nitrogen utilization efficiency as the grain dry mass in relation to the total amount of Nitrogen in above-ground plant at harvest.
B. The surface temperature of the canopy is related to the amount of transpiration resulting in evaporative cooling.
C. Normalized water index 3 is used track changes in rwc, leaf water potential, stomatal conductance, and foliage minus air temperature differences when plant water stress is well developed (rwc<0.85).
D. Rate of passage of either water vapor or carbon dioxide through the stomata.

Answer: Rate of passage of either water vapor or carbon dioxide through the stomata.