Approximate date for the invention of cast iron in China and the earliest possible date for the invention of the iron plough, which by the third century BCE, with better casting techniques, would become the heavy moldboard iron plough.
Jews, Church & Civilization. An Integrated Historical Timeline
Approximate date for the invention of cast iron in China and the earliest possible date for the invention of the iron plough, which by the third century BCE, with better casting techniques, would become the heavy moldboard iron plough.