section_path: Economy/Agriculture
section_name: Agriculture
paragraph_text: Agriculture
  
  Irrigated agriculture spread southwards from the Zagros foothills with the Samara and Hadji Muhammed culture, from about 5,000 BC.
  
  In the early period down to Ur III temples owned up to one third of the available land, declining over time as royal and other private holdings increased in frequency. The word Ensi was used to describe the official who organized the work of all facets of temple agriculture. Villeins are known to have worked most frequently within agriculture, especially in the grounds of temples or palaces.
  
  The geography of southern Mesopotamia is such that agriculture is possible only with irrigation and with good drainage, a fact which had a profound effect on the evolution of early Mesopotamian civilization. The need for irrigation led the Sumerians, and later the Akkadians, to build their cities along the Tigris and Euphrates and the branches of these rivers. Major cities, such as Ur and Uruk, took root on tributaries of the Euphrates, while others, notably Lagash, were built on branches of the Tigris. The rivers provided the further benefits of fish, used both for food and fertilizer, reeds, and clay, for building materials. With irrigation, the food supply in Mesopotamia was comparable to that of the Canadian prairies.
  
  The Tigris and Euphrates River valleys form the northeastern portion of the Fertile Crescent, which also included the Jordan River valley and that of the Nile. Although land nearer to the rivers was fertile and good for crops, portions of land farther from the water were dry and largely uninhabitable. Thus the development of irrigation became very important for settlers of Mesopotamia. Other Mesopotamian innovations include the control of water by dams and the use of aqueducts. Early settlers of fertile land in Mesopotamia used wooden plows to soften the soil before planting crops such as barley, onions, grapes, turnips, and apples.
  
  Mesopotamian settlers were some of the first people to make beer and wine. As a result of the skill involved in farming in the Mesopotamian region, farmers did not generally depend on slaves to complete farm work for them, but there were some exceptions. There were too many risks involved to make slavery practical, i.e. the escape/mutiny of the slaves. Although the rivers sustained life, they also destroyed it by frequent floods that ravaged entire cities. The unpredictable Mesopotamian weather was often hard on farmers. Crops were often ruined, so backup sources of food such as cows and lambs were kept. Over time the southernmost parts of Sumerian Mesopotamia suffered from increased salinity of the soils, leading to a slow urban decline and a centring of power in Akkad, further north.