OP, if you want investment, then forget about it. However, if you have a farm and want to be involved in cryptocurrency, in theory, there might be some ways. Well, you could sell your crops in Bitcoin, but I doubt it will be handy. You can also utilize waste by creating a biogas power plant connected to the mining rig.

But again, it would be better if you just being an ordinary farmer, focus on the productivity of your crops, and forget about cryptocurrency. You could, however, save a little bit amount of money in crypto just in case this technology become mainstream.