corn is planted in paired rows, usually 7 to 8 inches apart, on 30-inch centers. The idea behind this system is to gain a more uniform spacing of plants, similar to narrow-row corn. The theory is ...

From soybean row spacing ... than 30" corn, and even higher in the tougher parts of the field.” Ferrie and Bauer both report that twin row corn yields topped off about 3,000 plants per acre ...