Bluebulb Projects' The Measure of Things presents:
680 is about nine-tenths the number of Kernels on an Ear of Corn.
In other words, the count of Kernels on an Ear of Corn is 1 times that amount.
(Corn, a.k.a. Maize; Kernel a.k.a. Seed) (average) (for Dent Corn, a.k.a. field corn)