Available corn a factor in ethanol plant construction, expansion

Ethanol plants are springing up in South Dakota like corn plants on a hot day, and officials are keeping an eye on the industry and the corn supply before the market is tapped.

No one will build an ethanol plant without enough corn to run it profitably, said Tom Branhan, chief executive officer of Glacial Lakes Energy. That's why more plants are being built and planned: Companies

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