Cheap, sensor-based agriculture could slash water use by up to 70%

https://www.zmescience.com/science/agriculture-science/cheap-sensor-based-agriculture-could-slash-water-use-by-up-to-70/

"antennas that make transmission of data easier and are able to broadcast information to irrigation systems up to 650 feet (200 meters) away... between 20% to 72% of water usage can be reduced... estimating soil nutrient levels and identifying pests"

Related:

Sensing water for smarter agriculture

https://phys.org/news/2023-02-smarter-agriculture.html

Researchers use calcium materials to reduce arsenic availability in agricultural soil

https://phys.org/news/2023-03-calcium-materials-arsenic-availability-agricultural.html