After the death of Alexander the Great, a series of three pharaohs named Ptolemy ruled Egypt. The culture of Egypt during
that period was primarily Greek.
... In the Ptolemaic period, Greek temple records presented each region as an economic unit, and referred to the name
of the canal which irrigates the region, the cultivated region which is located on the river's banks and is directly irrigated
with its water, and the lands located on the region's border that could be reclaimed. The beds irrigation system allowed
cultivating one winter crop; while in summer, the only lands that could be cultivated were the high lands away from the
flood. Thus, when the Egyptians invented tools to lift water, such as the shaduf, they were able to cultivate two crops
per year, which was considered a great advance in the field of irrigation. The shaduf was invented in the Amarna period
and is a simple tool which needs two to four men to operate. The shaduf consists of a long, suspended pole weighted at
one end and a bucket tied at the other end. It can lift about 100 cubic meters (100,000 liters) in 12 hours, which is
enough for irrigating a little over a third of an acre....
: Agriculture - Part I, Ancient Egypt History, EgyptHistory.com