"eSoil: Low power bioelectronic growth scaffold enhances crop seedlings growth" (2023) http://dx.doi.org/10.1073/pnas.2304135120

- "Electronic “soil” enhances crop growth" https://www.eurekalert.org/news-releases/1029701 :

> Barley seedlings grow on average 50% more when their root system is stimulated electrically through a new cultivation substrate. In a study published in the journal PNAS, researchers from Linköping University have developed an electrically conductive “soil” for soilless cultivation, ; eSoil

Looks like the PNAS DOI URL is 404'ing?