Differential and absolute ground rent

Differential ground rent and absolute ground rent are concepts used by Karl Marx in the third volume of Das Kapital to explain how the capitalist mode of production would operate in agricultural production, under the condition where most agricultural land was owned by a social class of land-owners who could obtain rent income from farm production. Rent as an economic category is regarded by Marx as one form of surplus value just like net interest income, net production taxes and industrial profits.

Source: Wikipedia — Differential and absolute ground rent (CC BY-SA 4.0)