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

Which of the following definitions best describes 'Photoperiod sensitivity coefficient of the variety based on CERES model'?

A. the concept : In short day plants, flowering occurs when day length becomes shorter than a the concept.
B. Time of germination after planting
C. the concept or flag leaf emergence.
D. CERES model considers that, above criticial photoperiod (P2O), a linear growth of the duration of the vegetative phase (in degree days) as a function of photoperiod. The slope of this line (P2R) defines photoperiod-sensitivity.

Answer: CERES model considers that, above criticial photoperiod (P2O), a linear growth of the duration of the vegetative phase (in degree days) as a function of photoperiod. The slope of this line (P2R) defines photoperiod-sensitivity.