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

Which of the following definitions best describes 'Panicle length estimation - 5 panicles'?

A. Measure the secondary kernel width.
B. Measure the canopy temperature.
C. Calculation of the average panicle length from five mature panicles measured from the lowest panicle node to the tip of the apical spike
D. Laboratory analysis of nitrogen content in the oat/groat of a sample.

Answer: Calculation of the average panicle length from five mature panicles measured from the lowest panicle node to the tip of the apical spike