Trying the nigeria economic mission. There seems to be nothing I can do to get my cereals production to increase. I've set it to 0 tax, interest rate is 0, environment spending is high, global demand is through the roof, what am I missing?

There's one chap on the steam forums that played it through to 2070, is that seriously the way to do it?

I don't understand the lever that affects production.

I finally beat this. My main problem was I didn't control my borders early on. Having closed off immigration I was able to eventually kick my food supply into the positive, then move down the resources until I'd balanced them all (took a common market deal with Brazil to balance out the 2 I didn't produce anything of).

And yes, it takes until about 2070, I think I could be a little quicker if I tried again.