SAN LUIS OBISPO – FBI agents sifted through dirt Wednesday at an excavation site on the edge of Cal Poly San Luis Obispo, where they hope to find remains of a student who vanished in 1996. The ...

Yamina Pressler has made dirt her life’s work. The Cal Poly soil ecologist studies tiny organisms that live in the soil. But she doesn’t limit her passion to her research or the classroom. She ...

Understanding three commonly used gardening terms -- texture, structure and tilth --... The dirt on soil: It's about texture, structure and tilth Seattle Post-Intelligencer Logo Hearst Newspapers Logo ...