Table 3.

Summary of the GHG categories included in the calculations.

Name	Description
Feed: fertilizer production	Emissions arising from the production of synthetic fertilizers applied to crops
Feed: crop N2O	Direct and indirect nitrous oxide from the application of N (synthetic and organic) to crops and crop residue management
Feed: crop energy use	CO2 from energy use in field operations, feed transport and processing
Feed: crop LUC	CO2 from land use change arising from soybean cultivation
Feed: rice CH4	Methane arising from flooded rice cultivation
Feed: fishmeal	CO2 from energy use in the production of fishmeal
Feed: other materials	Emissions from the production of a small number of "other" feeds (including animal by-products, lime and synthetic amino acids)
Feed: blending and transport	CO2 from energy use in the production and distribution of compound feed
Pond fertilizer production	Emissions arising from the production of synthetic fertilizers applied to increase aquatic primary productivity
On-farm energy use	Emissions arising from the use of electricity and fuels on fish farm
Aquatic N2O	N2O from the microbial transformation of nitrogenous materials (fertilizers, excreted N and uneaten feed) in the fish farm water body