OverseerFM automatically generates GHG emission reports for the farm analysis based on the farm management information entered and using a series of default transport and fuel use settings. These are based on national averages and estimated for different farm types e.g. dairy, cropping etc. This means that the GHG report can be estimated with no additional inputs.
If preferred, or required for certification you can use the GHG input tab to override default values for key information such as fuel and electricity use, transport distances, and fertiliser application methods.
Transport distances should be entered as the average distance which the imported product travels from it's production point to the farm e.g. 37km from runoff to the dairy block, or 212km from fertiliser manufacturing plant to the farm.
If you have multiple sources do not sum these together, rather you should establish an average distance.
The impact of transport emissions on a farm (including arable) are typically small, so unless accurate fuel and transport information is available, we do not recommend over-riding the default settings. However, if GHG emissions information is being used to support a carbon certification process, then more detailed information may be required.
Assumptions in the default settings are set out in the Overseer Technical Manual for Carbon dioxide, embodied and other gaseous emissions which can be found here