Figure 1. Size distributions of kernel types of Morton oat grown in Casselton, ND in 2004. S1, primary kernels from single kernel spikelets; D1, primary kernel from two-kernel spikelet; D2, secondary kernel from two kernel spikelet; T1, primary kernel from triple kernel spikelet; T2, secondary kernel from triple-kernel spikelet; T3, tertiary kernel from triple kernel spikelet.