Increase in Supply <> Increase in Demand. They are independent variables.
I never expect writers to get basic economics right.
It’s a quibble, though. Great news about the plant expansion!
Yep, I get it. I think the processor sees a market opportunity and is growing to monetize a (perceived)increased demand.
This creates an increased demand for the potato suppliers.
The article does not explain this clearly, seeing only good news for the farmers.