The roundtable focused on legislation passed by the state's General Assembly that would lower revenue by $776 million.
Nixon says Missouri Soil and Water Districts will lose funding for programs to help farmers if the special breaks become law.
"This is all unnecessary and it's my hope that the legislature does not override those but if they don't they're are going to be real and significant deep budget cuts throughout the Show-Me-State."
Nodaway County's Soil and Water Conservation Chairman Kevin Stiens says the cuts would have a major impact on farmers.
More than 3,000 farmers in Nodaway County could be at risk.
"If the legislature passes this and we get all these tax cuts, it's going to trickle down and there will be a lot less money going around," said Stiens.
In Nodaway County, farmers receive $13,000 dollars every three years to use toward crops.
That money is used to help them prevent soil erosion and protect water resources.
Others say it's a monumental moment for the state and it would not affect state services.
"The first tax reform, tax relief measure that this state has seen in nearly 100 years," said Speaker of the House Rep. Timothy Jones.
But Nixon says he's hopeful the General Assembly will save farms.
"I thinks folks are beginning to make that connection between the realities and our hope is that these vetoes will be sustained." Nixon said.