There was the question about mineral in manure. There may be two points out there.
First of all, there's the ratio. When we're dealing with organic manure, there's a lot of phosphorus out there. When we apply manure, we try to respond to nitrogen needs. The nitrogen-phosphorus ratio of the manure is lower than the crop needs, so we have a certain imbalance there. That's why I was commenting on those areas where we're getting very excessively phosphorus-rich soils. The interesting aspect would be to reduce that nitrogen-phosphorus ratio of manure through solid and liquid separation, especially for pig liquid manure. That's one aspect.
The other aspect, in fact, is that mineral fertilizer—phosphorus, for example—is applied at seeding, while most of the organic manure loadings are applied pre-seeding or in the fall, when it is subject to soil compaction and more prone to runoff. That's a big issue, I believe.