Yes, for completeness, the federal carbon-pricing instrument was not created in isolation. It was part of the pan-Canadian framework for pricing carbon pollution, and from the outset it was clear that one of the models the federal government was looking at was the provincial carbon tax in British Columbia. When you look at the specificities of that carbon tax, there is indeed an exemption for certain fuels used in farm activities, including diesel and gasoline. That definitely played an important role in implementing a similar exemption as part of the federal package of instruments.
On May 4th, 2021. See this statement in context.