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

Which of the following definitions best describes 'SN Computation'?

A. Calculated as grain yield per unit of Nitrogen taken up.
B. Standard method for canopy temperature depression.
C. Calculated from yield components sampling.
D. Calculated as total amount of Nitrogen in the straw at harvest.

Answer: Calculated from yield components sampling.