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

Which of the following definitions best describes 'Leaf biomass estimation'?

A. Observe relative or absolute area of plant tissue affected by Powdery mildew and record it. Often severity is represented as a proportion or percentage of plant surface affected.
B. Estimation of the leaf biomass as a leafiness rating on a 0-9 scale: very leafy= 3, few leaves=9.
C. Observe relative or absolute area of plant tissue affected by Loose smut and record it. Often severity is represented as a proportion or percentage of plant surface affected.
D. Observe relative or absolute area of plant tissue affected by Stem rust and record it. Often severity is represented as a proportion or percentage of plant surface affected.

Answer: Estimation of the leaf biomass as a leafiness rating on a 0-9 scale: very leafy= 3, few leaves=9.