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Sheilah Roenfeldt, above from left, a Science Fair judge from Fayetteville discusses plant growth Thursday with Fayetteville High School sophomores Erin Farrah and Sydney Crockett at the annual Science and Engineering Fair at Fayetteville High School. The duo’s project, “Don’t Soil Me,” looked at what material would affect plant growth. More than 170 projects were entered in the fair.