Their research is biast to the multinationals that fund them. Do your own test and you know what works and what doesn't. Guess they also tell you not to plant soybeans 2 years in a row.  Baloney. I got fields that are 6 years beans now. No difference from 1st to 6th.

My rows are still on european spacing ( 80 cm ) that is 31.5 inches. Yes most of my equipment has to be widened. Too much equipment to change over to 30 " so we just stick with what we got. Besides it works better with our tire spacing.