How to quickly ramp up wheat production world-wide?

The world just lost 20% or more of its wheat production.

How can we pick up production slack in the rest of the world, as quickly as possible, to cushion price increases in the developed world, and prevent starvation in developing countries?

A lot of land is fallow now, due to either political incentives (EU regulations) or due to increased cost of seed and fertilizer.

The window of opportunity is closing fast, summer is approaching.