Hon DAVID PARKER (Minister for the Environment): Intensive winter grazing releases sediment to waterways. At a 15 degree slope, I'm advised that twice as much sediment is lost as at 10 degrees, and at a 20 degree slope, the amount of sediment lost is 300 percent. Under the intensive winter grazing regulations, intensive winter grazing is a permitted activity on slopes up to 10 percent. Ministry for Primary Industries modelling at the time of that showed that a very small percentage of fodder crops are on slopes of more than 10 percent. I'm advised the 10,000 number referred to by the member is based on an aggregate of theoretical maximum amounts of intensive winter grazing, and that that has not been verified on the ground and is likely to be on the high side. None the less, I have asked my officials to look into the expected number.