I think David makes some good comments.
When I was a young man starting in the seed business, it was a different world. We had a lot of public, maybe private, varieties in the marketplace, but the royalty structure on a bushel of seed sold to the farmer was about one-tenth of what it is today. We were remitting royalties of anywhere from 10¢ to 25¢ a bushel on seed varieties back then to organizations like SeCan. As public plant-breeding money was cut off, we've seen higher and higher royalty structures in the seed business, as plant breeders had to get a return on their investment. It wasn't long before we stared seeing royalties more along the lines of $1 a bushel on certified seed sales. That's when we saw the farmers resort more to brown-bag seed, using their own seed, and not buying new seed in the same quantities.
If you talk to most seed growers or seed processors in western Canada, they would say they've seen a drastic reduction in the amount of seed they sell versus 20 years ago. If it were only 25¢ a bushel, most farmers would be more inclined to buy higher volumes of certified seed and new varieties, as David was saying. If 10 farmers bought all their seed at 25¢ a bushel royalty, it generates a lot more money at the end of the day than farmers buying smaller amounts at the higher royalties. It's an economic engine.