First I would like to Thank you for taking such step or even thinking about it.
I do think that Agriculture and cryptocurrencies are way way apart but I do think there is something you could do.

If you do feel comfortable you can create a website which sells the products directly from the farmers without any middle men and you can start receiving payments in bitcoins itself , do give them some discounts if they are paying in bitcoins because you know When you eradicate the middle men you are gonna save up a lot for the farmers and this profit , even 1-2% of it can be used to give discounts for the people paying in cryptocurrencies.