Better pollination would be part of the reason if those ears in the east row are filled better than other rows. That is, less empty spots where kernels should be, but aren't. But your "small patch" of corn ought to be large enough for everyone to be pollinated sufficiently. And this would not account for the increase in number of ears. That is determined by the vigor o the plant.
Somehow, you just have better growing conditions where you have more, better ears. Less heat stress, more water, better soil, etc. Is this row next to the lawn?
