Flying on or high boy applied rye/cover crop seed in late summer corn is getting more and more popular around here... Andy Linder in Faribault County has two Hagie high boys dedicated just to application of cover crop seed. Has great potential I think, biggest issue is not enough sunlight in the narrow rows limiting growth. Cereal rye doesn't do well in "shaded conditions". Annual ryegrass and clovers seem to do the best. Lots of interest with the grazers though in 60 inch rows because that'll give you like 5 times more cover crop growth vs. 30's.
Here's a link to a Youtube vid of Andy. I think he's located at Kiester, but he's travelled quite a ways to do application... tries to get his jobs booked ahead of time, and then get a route to avoid too much road time.
(35) Cattle Grazing on Cover Crops in Faribault County, MN - YouTube
I broadcast 70# of cereal rye into all of my beans this year Sept. 1, when I just saw the first signs of leaves starting to turn. Worked great, fields were green as soon as the combine went through. But when you cut the beans, you also cut the rye, right close to the ground. Not enough year and sunlight left to get you to a grazeable yield after that. WAY better than waiting till after harvest to plant though, and with rye, that early start will pay off big time come spring.
Where I'm planning to convert to pasture next year, I put red clover and hairy vetch in that Sept. 1 broadcast too. Then I came back in right behind the combine with the NT drill with another 45# of rye (plus a little more red clover/hairy vetch where I'll pasture). Looked really green and beautiful as we went into winter and snow. I'll frost seed the rest of the pasture mix in spring, with oats as a carrier. I'll be set up great for one or two good grazing passes before June this spring.
Just found this video of Andy and his High Boy seeder too:
(35) High Clearance Cover Crop Seeder with Andy Linder - YouTube If you're up in his area, he's a great guy and a wonderful resource.