C372 A brilliant plan

In Song Dynasty, the main food in the north was wheat, millet, millet, millet, and sorghum. Because of the lack of agricultural techniques, the yield per mu was around one to two hundred catties.

Even taking into account the difference between Song Jun and Song Jin, the yield per mu was only about 300 Jin.

A thousand catties per mu was an unimaginable number.

If the production was that high