Geometric design and engineering of biodegradable materials could improve versatility, efficiency of aerial seeding
How seeds implant themselves in soil can seem magical. Take some varieties of Erodium, whose five-petalled flowers of purple, pink or white look like geraniums.
The seed of these plants is carried inside a thin, tightly wound stalk. During rain or high humidity, the corkscrew-like stalk unwinds and twists the seed into the soil, where it can take root and is safe from hungry birds and harsh environmental conditions.
Inspired by Erodium's magic, Lining Yao, the Cooper-Siegel Assistant Professor of Human-Computer Interaction at Carnegie Mellon University, worked with a team of collaborators to engineer a biodegradable seed carrier referred to as E-seed. Their seed carrier, fashioned from wood veneer, could enable aerial seeding of difficult-to-access areas, and could be used for a variety of seeds or fertilizers and adapted to many different environments. It's an idea that Yao, the daughter of part-time farmers, has pondered since she was a Ph.D. student at MIT in the mid-2010s.
"Seed burial has been heavily studied for decades in terms of mechanics, physics and materials science, but until now, no one has created an engineering equivalent," said Yao, director of the Morphing Matter Lab in the School of Computer Science's Human-Computer Interaction Institute. "The seed carrier research has been particularly rewarding because of its potential social impact. We get excited about things that could have a beneficial effect on nature."
