I don't know what "blocked in rows of 2" means. If you mean 2 long rows with 25 plants in each row than it is not the best way to plant corn for optimum pollination.
It would be better to plant 5 short rows of 10 plants each to make a big square block. That way you have more plants spreading their pollen to each other. Each kernel of corn will require a pollen grain so you want the plants close together, not in long rows.
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