It is considered rude to bump, and it is explicitly against site rules to "necro" a dead thread (one that's been abandoned more than a few months) -- a checkbox should have appeared warning you not to do that.
[ normally @CalBear would also lock the dead thread at this point... ]
To significantly improve agricultural output he needs to at least purge Lysenko and posthumously rehabilitate Vavilov (which he was asked to do in OTL's "Letter of Three Hundred" but refused).
It's probably too late to do what he really needed to do: re-kulakization, so farming is overseen by...
Much more lethal: call it the Red Death. Africans only get a mild fever and rash, anyone with the AKCR1 gene (the rest of humankind) gets a cytokine storm and dies.
[ Sorry China, you weren't even doing slavery, and now only archaeologists can read Chinese... ]