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

Which of the following definitions best describes 'Leaf length/width ratio mean - method'?

A. Ratio of the weight of the above ground biomass to that of the below ground biomass
B. The ratio of the mean leaf length to mean leaf width for a plant 75 days after planting.
C. Calculation of incidence as the percentage of dead plants.
D. Specific leaf areas were estimated using the first expanded leaves of 4 lateral branches on each plant taken in the morning 60 days following germination.

Answer: The ratio of the mean leaf length to mean leaf width for a plant 75 days after planting.