I'm the founder of an AgTech/FoodTech startup in California. There's definitely more and more interest from the investment scene towards AgTech.
The link Joy provided is definitely something to check-out. Roger Royse, who's behind the Silicon Valley AgTech accelerator is also the person who incorporated our company. He has a high focus on AgTech.
I would also check out www.agfunder.com. It's an investment platform for AgTech focused companies.
If you're a foreign startup looking for a good accelerator/incubator then I would also recommend to look at www.foundersspace.com. I went through their program and they're heavily engaged with foreign start-ups.
Finally I would also look at www.agtechinsight.com.
If you would like an introduction to any of them, just let me know.