Irrigation agriculture has been one of the primary economic mainstays of the lower Kura valley since ancient times.
12.
The area was part of the Akhal Oasis where streams coming down from the Kopet Dagh support irrigation agriculture.
13.
It is speculated by some archaeologists that Sumerian speakers were farmers who moved down from the north, after perfecting irrigation agriculture there.
14.
He said that one of the major problems with finding underground IEDs was that most areas of Kandahar relied on artificial irrigation agriculture.
15.
The ecoregion has no protected areas and is severely affected by the expansion of irrigation agriculture, which is the main cause of the rapid pace of its destruction.
16.
After 1000 BCE, Las Haldas was gradually abandoned as the importance of irrigation agriculture grew and coastal settlements became smaller and subsidiary to inland agricultural communities in river valleys.
17.
The oldest agrarian settlement seems to have been based upon intensive subsistence irrigation agriculture derived from the Samarra culture to the north, characterised by the building of canals, and mud-brick buildings.
18.
Even though irrigation agriculture had been well established for thousands of years, until the 1920s, humans did not have a significant effect on the ecology or hydrology of the Kura River watershed.
19.
Africa alone has a potential of 40 million hectares ( about 99 million acres ) for irrigation agriculture, but it currently uses only 12 million hectares ( about 30 million acres ), the agency said in a study.
20.
To the south it grades off into semi-desert and desert which is interrupted by two great rivers, the Amu Darya ( Oxus ) and Syr Darya ( Jaxartes ) which flow northwest into the Aral Sea and provide irrigation agriculture.
