allAfrica.com has this interesting story about an entrepreneur who creates liquid and pelleted fertilizer from water hyacinth (Eichhornia crassipes) plants. When he first began the project in Uganda, he did not even realize what plant he was harvesting for his product. Since then, he has shown that many nutrients can be extracted from water hyacinth, and has even used it to formulate animal feed.
Thanks to a member of the ALIENS-L listserver for posting a link to this story.
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