Israel’s Saturas develops sensors that are planted in the trunks of trees, and vines, and provide accurate hydration status reports that enable farmers to optimize irrigation. Saturas has completed field trials in citrus, apple and almond orchards and has raised $4 million of funds to market in Spain and the USA.
https://www.calcalistech.com/ctech/articles/0,7340,L-3732884,00.html