Under the same terrain conditions, the Erodium seed's success rate was found to be zero percent.
The researchers designed a wood-based biodegradable seed system comprising a seed carrier with three coiled tails. These unwind when moistened and can carry seeds as large as those of whitebark pine trees, which are about 11 mm long and weigh about 72 mg.
So, how does it work? A drone will disperse the seed carriers. Once settled on the ground, "moisture causes the cells to swell and the coil to unwind, drilling the payload down; the coil then wound up again as it dried, pushing the payload deeper underground", Naomi Nakayama Imperial College London, London, UK, writes.The number of unwinding tails has been increased to ensure that the drill bit is more angled to the surface for easy burrowing.
The researchers compared natural Erodium seed's success under the same terrain conditions and found the success rate to be zero percent. The authors conclude that these carriers can also deploy fertilizers or other materials, like sensors, that could be helpful for agricultural and conservation applications.Aerial seeding can quickly cover large and physically inaccessible areas1 to improve soil quality and scavenge residual nitrogen in agriculture and for postfire reforestation and wildland restoration.
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