Earlier farmers watered their crops by wooden plows. This was back in the older days.
There's not enough rain to water the crops. The farmers have to get the water that runs off the mountains to where the crops are.
They Can Use Groundwater
early farmers who cultivated crops and domesticated animals
By trapping water in dams and weirs, and leading irrigation channels through the fields.
Farmers in the region often rely on irrigation because the natural water supply through rainfall may be insufficient or unreliable to support crop growth. By using irrigation, farmers can ensure a consistent water supply for their crops, leading to higher yields and better overall productivity.
Farmers could use the water to water the crops
Well one reason is because, it provided silt for the crops.
Farmers take or divert water from a river for irrigation purposes, and to water their crops.
They dug holes to move it and they built dams to make sure they had enough water but there crops didn't flood.
They get dehydrated and die. Farmers can't grow their crops. Cities don't have enough water to supply their people.
To provide the crops with enough water for strong, healthy plants when natural precipitation is lacking.
The Aztec farmers watered their plants by waiting for rain to give them water.