The invention of irrigation systems & plows (30 gen 3100 anni a. C. – 30 gen 2334 anni a. C.)

Descrizione:

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.

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