Major reforms needed to replace EU agriculture subsidies are not now expected to be introduced until after the next assembly election.
The Welsh Government had hoped to phase in its plans to replace the funding after Brexit.
But AMs are unlikely to pass legislation for farm support schemes until after the vote in 2021.
Ministers are also holding off replacing EU environmental protections while talks with UK ministers are held.
First Minister Mark Drakeford will announce his legislative programme for the next year in the Senedd on Tuesday.
Proposals in the pipeline include plans to overhaul the way Wales’ bus network is regulated.
Ministers want to give councils the powers to run bus services directly and to set the routes operators run.
The Public Transport Bill would aim to boost services by