I would never do this but cotton seed slabs attract carp big time, they decompose in the water slow attracting lots of fish.
When I was still in school, I would cut cotton seed blocks into 1 1/2 squares for a local bait shop, they would put a large hook on a stringer hanger facing out then the block then another hook facing the other way, hang them from a limb and have two carp snagged by morning., the fish would come up sucking on the cotton seed and get snagged by the hooks.