Agroecosystem energy metabolism in Czechia and Poland in the two decades after the fall of communism: From a centrally planned system to market oriented mode of production

•Czech and Polish agroecosystems have changed profoundly over the last two decades.•Poland has a higher share of animal husbandry and it is less energy efficient.•Economic factors are the main driving forces.•Both agricultures moved from a subsistence mode to a market oriented one.•Poland is an important exporter of food while Czechia mainly exports raw materials.