Getting the amount of irrigation exactly right is a challenge faced by many farmers; the tendency is usually to overwater (for fearing of under watering and killing the crops) but that is an inefficient waste of our planet’s dwindling natural resources.
As such, startups in Silicon Valley have turned their eyes towards agriculture and specifically towards irrigation management. One such innovation is a sensor unit that monitors soil moisture and can therefore recommend to the farmer the exact amount of water the crops needed. Another is a sensor with a recorder which listens to the raindrops falling on the soil and uses that to estimate rainfall. It works along with other sensors that can calculate soil moisture allowing the farmer to take informed irrigation decisions.