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

Which of the following definitions best describes 'Calculation - Harvest index'?

A. Take the total dry weight of straw, rachis, and grain (filled and unfilled) and express on a per unit area
B. Count the number of panicles per hill for several hills. Take the average.
C. Take ratio of grain yield to total dry matter per area
D. Measure the distance from the base of the panicle to the point of insertion of the lowest branch on five representative panicles and calculate their average

Answer: Take ratio of grain yield to total dry matter per area