MSG did you plant the buckwheat immediately after plowing? or did you plow, let the weeds sprout, then hit them with round-up before planting the buckwheat?
How was the weed growth with the buckwheat? I'm converting a weed field into turnips and like your idea, but the weeds really worry me.
Also, on another topic totally, I was reading a Food plot blog where I believe an Iowa hunter tested different food plot seeds over the last 3 years. He tested the pre-pared mixes and found that one variety always outdid the others and eventually took over the plot. His idea then was you should just plant one variety, Say just turnips rather than a brassica mix because $$ is wasted on the varieties that don't compete. I've never planted a mix (that grew anyway) but have got single variety.
