No farmer is applying nitrogen to soybeans. They fix their own nitrogen, and generally add nitrogen to the system. Any plant is going to take nutrients (native

No farmer is applying nitrogen to soybeans. They fix their own nitrogen, and generally add nitrogen to the system. Any plant is going to take nutrients (native or otherwise) from the system. Just because ornamental species don't have a commercial value doesn't mean they aren't extracting nutrients I am very familiar with corn being a grass. Although its seed are very much not tasty unless they happen to have a well known sucrose mutation.