How did the development of irrigation improve agricultural output during the Neolithic era? Irrigation made it possible to grow rice in very dry climates.
Irrigation was developed to bring water to animals on farms.
Irrigation ditches were used to mark the boundaries between crops.
Irrigation allowed for the movement of water to fields, even without rain.

Irrigation made it possible to grow rice in very dry climates. ... Irrigation ditches were used to mark the boundaries between crops. Irrigation allowed for the movement of water to fields, even without rain

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

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