"The inhabitants of the Indus Valley Civilization (3000-1500 BC, Mature Period 2600-1900 BC) developed a sophisticated system of standardization (Mathematical System), using weights and measures, evident by the excavations made at the Indus valley sites. This technical standardization enabled gauging devices to be effectively used in angular measurement and measurement for construction.
Calibration was also found in measuring devices along with multiple subdivisions."
"As early as 6,000 BC farmers used irrigation to control floods and to guide water to areas where they could grow barley, even in areas where there was not enough rainfall. The ancient Mesopotamian also were among the first to use water caches to store excess water for times of drought.
This basic skill, of bringing water to crops to expand arable land and increase food production, is still a fundamental skill of farmers around the world today."