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Australia has applied a variety of methods to review and verify the data, methods and results of its livestock inventory. NIR 2017 reports the following activities have been conducted:
| Inventory element assessed | Methods for QA/QC or verification | Summary findings |
|---|---|---|
| Activity data | - Australian Bureau of Statistics has QA/QC procedures - QA/QC procedures applied in inventory compilation - Inverse modelling of cattle and sheep populations to ensure consistency with reported populations - External reviews of data | No apparent bias in sheep numbers, possible differences in cattle numbers were incorporated into uncertainty estimates |
| Implied emission factors | IEFs were compared with IPCC defaults for the region | Higher dairy cattle IEF can be explained by higher milk yield in Australia than in the IPCC default |
| Feed intake | - Comparison of feed intake estimates with IPCC recommended 1-3% of live weight - Comparison with feed or energy intake values in other countries’ inventories | |
| Methane conversion rates | - Comparison with IPCC values - Reference to scientific reviews | - Conversion rates consistent with IPCC default - Inventory values within the range reported in the literature and supported by meta-analysis |
Author: Andreas Wilkes, Values for development Ltd (2019)