Well two things here. The first is that a lot of agricultural land is leasehold, not freehold. The second is that below a certain depth, the Crown owns what's

Well two things here. The first is that a lot of agricultural land is leasehold, not freehold. The second is that below a certain depth, the Crown owns what's underground and has the right to go through your property to get to its property, whether directly or by leasing it to a mining company.