The Government says it's committed to working with farmers in the wake of National's newly announced emissions policy.

If elected, National would push back the start date for farmers paying for emissions to 2030.

Agriculture Minister Damien O'Connor says Federated Farmers has walked away from He Waka Eke Noa, the Government's emissions policy, but other groups are still on board.

O'Connor says Labour's not going to put in tax on nitrogen emissions.

"It's up to them. We've worked with them all the way through, we're not going to impose something on them that they don't think is workable. But just delaying is not going to help them in the market."

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