One of my latest (failed) experiments; I was trying to address the need for converting clover patches into more rye growing in the winter, because the clover fades in mid-December here, and rye usually has some green grazing available for most of our zone 6b winter, provided that the snow doesn't have it buried.
So early last September I was planting rye in a terminated oats field (this rye grew just fine) and, as an experiment I no-till drilled a few passes of rye into an adjacent 8" tall stand of ladino clover, so the seed was planted perfectly, at about a 1" depth in very good soil, with an aggressive plant like rye, and? NOT ONE SINGLE RYE STALK EMERGED! The clover apparently choked it out.
So I had this great epiphany, but alas, I'm no einstein. Back to the drawing board.