Agriculture Secretary Tom Vilsack will speak at the Growth Energy Executive Leadership Conference in Phoenix on Thursday and at the Commodity Classic on Friday, the Agriculture Department said today.

Agriculture Deputy Secretary Krysta Harden will also participate in events at the Commodity Classic, USDA said.

Darci Vetter, the chief agriculture negotiator, will speak to the Growth Energy Conference on Thursday, Growth Energy announced.

Vetter will also speak at the Commodity Classic Friday to a meeting of trade-focused members and staff from the commodity groups.