

The most well-known calculator for estimating GHG emissions in farm is using is the nutrient budgeting tool OVERSEER®.
This uses nitrogen inputs and outputs, as well as the number and productivity of animals, to calculate the unique nutrient budget of a farm, and makes broad inferences from nutrients to greenhouse gases using simplified relationships.
OVERSEER® can only provide an approximate farm-level greenhouse gas assessment, since it does not fully reflect all the variables that can affect the unique greenhouse gas budget of a farm (e.g. the specific soil moisture profile and microclimate on the farm).
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