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

Which of the following definitions best describes 'Root lodging incidence'?

A. Number of grain rows in the central part of the uppermost ear.
B. the concept. The plants that show root lodging, i.e. those stems that are inclining by more than 45¡.
C. the concept per unit area, either field weight basis, dry weight basis or adjusted to 12.5% grain moisture.
D. Growth rate of the ear(s) on a plant. It may include the sum of the apical and sub-apical ear growth from prolific plants.

Answer: the concept. The plants that show root lodging, i.e. those stems that are inclining by more than 45¡.