If they still float after 24 hours, they might not be viable able to germinate. You can remove the leaves at this time, or you can wait until after the drying period. 2002b whereas the corresponding value recorded for Ambrosia artemisiifolia L.  Source: <a href=https://platimzafoto.ru/a-examine-of-the-passage-of-weed-seeds-through-the-digestive-tract-of-the-rooster/>https://platimzafoto.ru/a-examine-of-the-passage-of-weed-seeds-through-the-digestive-tract-of-the-rooster/</a>