Megan McKinney Photo by Deb Cobb.
Megan McKinney, a junior at Mount Vernon High School, stands next to her finished project board in the Robinson Secondary School field house just before the start of the 57th Fairfax County Regional Science and Engineering Fair on March 16. McKinney compared the rate at which different types of grass absorbed nitrogen. The goal would be to plant grasses that would reduce detrimental runoff into important watersheds.