Visually Yellowstone is a strong plant with thicker stems, larger tendrils and more tillers than Alezan. Pod length is longer than Alezan with 2-3 more grains in each pod.
Yellowstone has consistently out-yielded Alezan in replicated plot trials in Canterbury. In its first seed multiplication area in Leeston in 2014/15 Yellowstone yielded 10.1 mt/ha from an irrigated 0.9 ha multiplication area.
The point of difference between Alezan and Yellowstone is consistently higher grain yield, a larger grain size and improved tolerance to powdery mildew
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