Ask HN: Agriculture startups doing interesting work?

Maybe I'm out of the loop, but agriculture seems to be an overlooked industry in the startup world, even though there is a ton of opportunity there. What are some startups who are solving tough agricultural problems? Who are some more established players? I'm curious about any ag startups, especially those attempting to curb climate change through agriculture. For instance, new takes on outdoor farming techniques (like Indigo), indoor farming startups, folks working on agricultural hardware, machine learning, organic farming, folks developing apps to help farmers, distribution/sales/marketing, etc.