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

Which of the following definitions best describes 'Percent of dead buds due to winter damage'?

A. Shoots from plants subjected to freeze-thaw protocol, distal buds assessed for damage and percent of damage calculated, measured as LT50 which is temperature that causes 50% injury overall.
B. Shoots with flower buds were collected every 200 chill units and buds were rated after 3 weeks at 24°C. Budbreak rated on scale of 1-7. Mean chilling requirements were calculated and used to determine number of chill units required for 50% budbreak.
C. Average diameter (mm) of fruit calculated from 30 fruit samples using the Agrosta penetrometer with turntable according to manufacturers instructions.
D. height x width measurement cm2

Answer: Shoots from plants subjected to freeze-thaw protocol, distal buds assessed for damage and percent of damage calculated, measured as LT50 which is temperature that causes 50% injury overall.