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DES MOINES — This was the last year for the Iowa Barn Foundation’s model barn exhibition at the Iowa State Fair.

The display, which rested in a 15-by-15 space inside the State Fairgrounds’ Agriculture Building, went out in style.

First, the foundation arranged for the construction of two silos to go with the model barn that had been the centerpiece of the exhibit for two years. (A windmill was added last year.) Dwight Hughes, an Iowa Barn Foundation board member from Cedar Rapids, did some fundraising to help cover the cost of constructing the silos and worked with Iowa State University officials to generate ideas for the silos’ construction and enlist the help of roughly 60 students for thei

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