These two pictures show the ears pulled from 17ft 4 in of a thirty inch row. There are 3 ears missing that i used for sampling. The ears are not in the order that i picked them. My question is, is it variable plant spacing, or uneven emergece, or a little of both that caused this?

(douglas north corn ears 30th row from south side 10 17 2016 001.jpg)

(douglas north corn ears 18th row from south side 10 17 2016 001.jpg)

douglas north corn ears 30th row from south side 10 17 2016 001.jpg (88KB - 158 downloads)

douglas north corn ears 18th row from south side 10 17 2016 001.jpg (71KB - 149 downloads)