Federated Farmers says dairy farm worker visas should last two to three times longer.
Workforce issues are a focus of the National Party's Primary Sector Discussion Document released today.
National is proposing better promotion of primary sector careers and increased vocational training opportunities.
It is also floating the idea of an Agriculture Visa for migrant workers and nine-month dairy farm placements under an expanded RSE (Recognised Seasonal Employer) scheme.
Commenting on the document, Federated Farmers Dairy chair and immigration spokesperson Chris Lewis said their biggest issue was that almost all dairy farm worker visas were now only for 12 months.