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

Which of the following definitions best describes 'Stem angle'?

A. Seed mass of approximately four representative plants that were harvested from the center of the plot (seed should be dried to constant weight)
B. Cutting plants at the very base with secateurs and drying the entire above-ground section of the plant. Recording total dry weight and number of plants that make up total dry weight. Divide total weight with number of plants to give weight per plant
C. Grain persistence in the plant at physiological maturity. Assessing how easy seeds fall off the panicle upon light touch: 1 = No seeds falling to 7 = a lot of seeds falling
D. The angle at which the majority of plants are leaning, measured between the vertical axis and the horizontal axis

Answer: The angle at which the majority of plants are leaning, measured between the vertical axis and the horizontal axis