Don't know about the US, but in the UK ownership of farmland is used as an inheritance tax dodge. Because of land rich but money poor farmers as a voting constituency, farmland is not counted for inheritance tax. The predictable result of this is people like Dyson owning most of the farmland in Lincolnshire (https://whoownsengland.org/2017/09/19/why-is-james-dyson-hoo...)