variable_of scale_of entity Use calliper, photo-enlarger or high-resolution (true 2400dpi) images to measure the distance from the base of the lowermost sterile lemma to the tip (apiculus) of the fertile lemma or palea. In the case of awned varieties, measure to a point comparable to the tip of the apiculus, i.e. excluding the awn. Calculate the mean of 10 representative grains Average grain length acronym method_of attribute