Table 1.

LCA data for chemicals, nutrients and enzymes

Input	kg CO2-eq. kg−1	MJ primary energy kg−1 (for production)	Source
Sulphur dioxide SO2	0.42	7.8	[7, 60]
Ammonia NH3	3.23	11.1	[61]
Phosphoric acid H3PO4	1.36	5.52	[61]
Antifoam	1.33	24.4	Average based on [62] and [63]
Diammonium phosphate (NH4)2HPO4	0.87	8.19	[61]
Magnesium sulphate MgSO4	0.308	1.1	[64]
Molasses	0.142	0.57	[7, 65]
Soybean oil meal	0.8	5.95	[65]
Ammonium sulphate (NH4)2SO4	2.6	10.4	[61] (primary energy based on general data for N-fertilizer)
Monopotassium phosphate KH2PO4	0.287	26	[66]
Iron(II) sulphate heptahydrate FeSO4*7H2O	0.093	1.13	Data for FeSO4 [60]
Enzymes	5.5	69a	Personal communication with Kløverpris, J. H., Novozymes A/S, February 2015. Estimation based on [7]
	g CO2-eq. MJ−1	Primary energy factor
Swedish electricity mix	10.1	2.1	[67]
Natural gas-based electricity	124	1.9	[67, 68]
Hard coal	106	1.15	[67]

^aCarbon footprint was re-evaluated by Novozymes A/S from 8 to 5.5 kg CO₂-eq. kg⁻¹ enzyme cocktail, a reduction by 31%. Fossil energy use was previously 100 MJ kg⁻¹ cocktail, from which the estimate here is reduced by 31%