 I'm investigating which native plant species might be the best plant species to plant beside rivers to absorb nitrogen coming off farmland into rivers, and this is mostly in the form of dairy effluents or cow poop or cow urine. So one thing I do is go out into the field and go to a river that's been planted with native plant species, and then I dig down beneath each plant and collect samples, take them back to the lab to see how much nitrogen is travelling beneath each plant. So we find that plants that are really leafy like your flax, cabbage tree, that also have really deep, fibrous root systems, tend to be absorbing more nitrogen than some of the tree species. I guess in situations when there's high nitrogen flow or lots of high intensity land use beside a river, you'd want to plant lots of leafy species that are going to absorb all that nitrogen. The application is that we could plant lots of these specific species like flax and cabbage tree on farms beside rivers to protect the rivers from any impacts the farm's having on them. I think that definitely needs further research and still questions regarding soil physics and soil hydrology that wasn't included in my study. But yeah, we definitely made a start because before we started this research there was pretty much nothing known about the difference between the different plant species.