Nitrogen flows within different western European agrarian systemsBack to list
Each letter indicates a different western European agrarian system and the nitrogen flows within it. It compares traditional methods, beginning from most primitive (a) to advanced/modern day methods (e). The paper discusses further on specific details of each farming system, but this graphic allows us to see the changes in complexity of farming practices as well as the extreme increases in Nitrogen fertilizers in modern day practices.
The food-print of Paris: long-term reconstruction of the nitrogen flows imported into the city from its rural hinterland
Billen et al.