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A Review of Greenhouse Gas Emission Factors for Fertiliser Production

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Fertiliser production comprises an important component of agricultural life cycle assessments where system boundaries are wide enough to include indirect emissions from agricultural inputs. Since fertiliser emission factors vary widely depending on production technology, it is preferable to use customised emission factors relevant to the particular plant from which the fertiliser under consideration was produced. Unfortunately, such information is rarely available. The objective of this report is to collate published emission factors for greenhouse gases (GHGs) associated with the production of a range of nitrogen, phosphate and multi-nutrient fertilisers, for use as inputs to agricultural and forestry life cycle assessments and calculations of GHG balance.