My hon. Friend makes a very good point. Young as I look, it was not many years ago that I was one of the—[Interruption.] Is that going to be a point of order? I was one of the youngest people sitting round the ring at Thainstone mart, buying cattle; the average farmer was aged 60 to 65. Let me comment, in response to my hon. Friend’s point, that perhaps the common agricultural policy payment scheme has, if anything, stopped the intergenerational change, and now that we are able to design our own policy, I hope that, as I said to the hon. Member for Caithness, Sutherland and Easter Ross (Jamie Stone), we can find a process to encourage new entrants. However, we cannot get past the fact that this industry is hugely capital-invested. We have to be realistic about what we are bringing new entrants in to do.
Since the war, there have been three generations on my farm in the north-east of Scotland. My grandfather was a doctor from Glasgow, but mysteriously decided to be a farmer. Apparently, land was cheap in the 1940s—there was a chap with a moustache who wanted to devalue most of the land in Europe. My grandfather bought a farm in the north-east and he will have started off the soil process of modern farming by putting on lime and draining the land. My father will have gone to the next stage by analysing the nutrient value of the crop and trying to do something about further drainage of the land and improving the soil. It is an ongoing process. Finally, I tried to introduce precision farming to reduce the compaction of soil.
It is important to recognise that farmers have made mistakes on land usage. My businesses previously were in East Anglia, where I saw monocultures. I recognise that monocultures do nothing for the soil. We have a relatively traditional approach in Scotland. Water will clearly become more of an issue, even in wet Aberdeenshire, where we already have nitrate-vulnerable zones. We must be conscious that the water is affected by everything that runs off our land.
On that point, having run businesses before, I was amazed to discover that as much as 75% of the nitrogen used on crops cannot be used by the crop. If cars leaked 75% of their fuel from the tank, we would try to redesign the system. Farmers are well aware that some of our farming practices can be improved. There are great opportunities in technology. Air is clearly a public good. Agriculture is said to produce 10% of gases emitted, but we have come a long way.
The NFU’s report showed that we increased economic growth in agriculture, while reducing the inputs, between 1990 and 2016. Farmers are taking action while output increases. This is an important point. Modern farming tries to produce as much as it can from an acre, in an efficient and sustainable way. Some 87% of farmers are recycling waste materials from their farms, 69% are improving fertiliser application accuracy, where, as I have said, an enormous amount can be done, 75% are improving energy efficiency, not to mention the amount of renewables, 38% are increasing their use of clover in grassland, 27% are improving nitrogen feed efficiency for livestock, and 27% are increasing the use of legumes in arable rotation. In all those figures there is still a great deal of room for improvement.