Average fertilizer mixes for nitrogen (N), phosphorus (P) and potassium (K) fertilizers were modeled using statistics provided by the International Fertilizer Industry Association. Inventory data for the production of individual fertilizers were derived from the EcoInvent database. These were representative of average European conditions but were modified to reflect regional energy mixes. All fertilizers and pesticides are assumed to be transported 1000 km (625 miles) by truck, and all seed inputs 100 km (62.5 miles) by truck. Energy inputs to crop production are based on Iowa averages (see Pelletier et al., 2010a,b).