The invention of irrigation systems & plows (30 ene 3100 año aC – 30 ene 2334 año aC)
Descripción:
The Sumerians needed a stable food supply so they invented plows and irrigation systems. Irrigation systems are very important and are used many years later as well. Irrigation systems made sure that there was always a steady supply of water. Plows also were a very very important invention that prepared the soil.Añadido al timeline:
fecha:
30 ene 3100 año aC
30 ene 2334 año aC
~ 766 years