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

Which of the following definitions best describes 'InfertSpkN Counting'?

A. Count the number of infertile tillers.
B. The number of infertile spikelets (i.e., those NOT containing grain) per spike should be counted towards the end of grain-filling, but before physiological maturity (to avoid losses due to movement through the plots). Randomly sample 5-10 spikes per plot, by selecting at the base of the culm. Count the total number of spikelets (pair-by-pair, from the base to the tip), then obtain the average.
C. Standard method for stomatal frequency.
D. Measurement of grain size distribution based on the percent mass of the grains greater than 2.8 mm based on screenings using the Seed Count (SC5000R) machine.

Answer: The number of infertile spikelets (i.e., those NOT containing grain) per spike should be counted towards the end of grain-filling, but before physiological maturity (to avoid losses due to movement through the plots). Randomly sample 5-10 spikes per plot, by selecting at the base of the culm. Count the total number of spikelets (pair-by-pair, from the base to the tip), then obtain the average.