Normally, I cut with the row for a couple of reasons including that the dividers don't knock down as much of the crop and it seams like the row of beans will help push the beans into the augur to feed better. This fall though, I had a field that I was cutting for a neighbor and he had planted the beans in 30" rows to begin with but when he got a poor stand due to our heavy rains this spring, he replanted portions of the field with a drill. Never really seen this before, but where they beans were solid drilled it didn't matter what direction I went, but in the row beans, I cut had to cut them at an angle, otherwise it was like pricefarms said the field looked like crap because the field was slightly wet and would drag up instead of cutting.