JWF, great idea! This is what we're working on with Future Tech Farm (
Link to bitsharestalk post here). One of our goals is to have the ability to track every single plant grown with proof of: No GMO, No Pesticide Utilization, etc... Publicly verifiable and an objectively better system than "Certified Organic" by at least an order of magnitude.
I'm a farmer (small acreage) and have been trying to devise uses for the blockchain in farming. The fact that you are focused on the future of food is awesome and needed. My goal is uses to get traditional small scale farms connected through a block chain using the current infrastructure available to most of them. I wonder if Baker Creek Heirloom seeds would be interested in this as a means of verifying their seed stock as they are
almost militantly against GMOs.
FTF looks to have good potential, but it really gives me the impression of being better used in large warehouse grows where the machines are all under control of one structure, network, security system.