One day on the green roof, early in the semester, we took apart one of the modules on the succulent green roof to look at the root culture of the plants that had stuck around since last year. It mostly ended up being one spreading succulent and some grass. Taking apart the first module was trial and error. It was difficult, at first, to figure out how to separate the plant roots from the filter fabric. We also had to sift out as much soil as we could to get accurate weight measurements.
At the end of the day, we learned a lot about how to conduct research studies with plants and how to construct a green roof module.