Sumerian Agriculture, Canals and Landholding

In southern Mesopotamia, in present-day Iraq, farming depended on channels that directed river water across a low, dry plain. Sumerian-speaking communities cultivated grain, tended orchards and herds, and organized labor to keep fields productive. Their records belong to different political settings: competing Early Dynastic city-states (c. 2900–2350 BCE), the Akkadian Empire (c. 2350–2150 BCE), and the Ur III state (2112–2004 BCE). A Sumerian poem about farming survives in early second-millennium BCE copies from the Old Babylonian period, later than Ur III, so it offers a literary account of agricultural work rather than a dated Ur III field log.

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Canals and the labor of water management

Canals needed planned earthworks as well as routine upkeep. A late third-millennium work account from the Umma region lists 150 cubic metres of earth to be moved for a barrage, a barrier controlling water flow, on the Sisa canal. It assigns 83⅓ workdays, with each worker’s task measured at 3.6 cubic metres and paid at six litres of barley. A separate line assigns a harvest-time canal crew ten litres per worker. Irrigation infrastructure therefore drew on scheduled groups of workers, and the grain accounts made their time and compensation visible.

Canal systems developed over centuries. A geoarchaeological survey at Tell Rumah found a canal between two settlements dated to the Middle and Late Uruk periods, about 3500–3100 BCE. The research team argues that these small local canals predate the artificial waterways usually associated with the later Jemdet Nasr period. From the late fourth millennium, minor streams also helped move goods and people by boat between early cities. In the Early Dynastic period (c. 2900–2350 BCE), city-states organized waterway construction and maintenance; the Akkadian state later used a different land-tenure structure, and Ur III records reveal a more centralized hierarchy for agricultural administration.

An Ur III maintenance plan for a canal serving the field Nanna-gugal describes sections to be repaired and a flow divider. The canal lay near the Inun waterway along the boundary between the provinces of Ur and Girsu-Lagash, where the two channels shared a breach. The royal administration set the overall plan, while the provincial administrations on either side had responsibility for the maintenance. The example shows why canal care connected central authority with local officials: water crossed field and district boundaries, and a breach could affect more than one jurisdiction.

From plowing to measured harvest

The Sumerian composition The Farmer’s Instructions presents a sequence of tasks through advice from an older cultivator to his son. First, inspect the levees, the raised banks bordering channels, and the canals and mounds that have to be opened. Let water into the field without raising it too high, then protect damp ground from trampling cattle. Workers clear weeds, mark the field’s edges and level the soil. The poem then turns to the plow team: oxen need spare animals, and tools and harnesses must be kept in working order.

For sowing, a seeder-plow opened furrows, and the cultivator was told to watch the worker dropping the seed. The text gives spacing and depth instructions, and advises changing the plowshare if seed does not fall into the furrow. It describes watering as the plants grow, including a warning against watering fully leafed barley because it could develop leaf rust. Harvest is divided among people who cut the stalks, tie sheaves and apportion them. After the sheaves rest, oxen trample them on a prepared floor. The poem also specifies securing the teeth of a threshing sledge with bitumen; threshing loosens kernels from straw. Two workers then winnow the mixture by tossing it so air carries away the lighter chaff, before measuring the clean grain.

Sumerologist Miguel Civil edited the composition from multiple tablets, many from Nippur. Most surviving manuscripts date to the Old Babylonian period, ca. 1900–1600 BCE.

Crops, animals and changing soils

Barley appears prominently in agricultural records and could serve both as food and as an institutional payment. Historian Thorkild Jacobsen argued that irrigation-related salinization, the buildup of salts in soil, contributed to a shift from emmer wheat toward more salt-tolerant barley at the beginning of the Akkadian period. Assyriologist Marvin A. Powell challenged the reading of key texts and argued that barley’s productivity and tolerance of seasonal variation also help explain its prevalence. Sumerian texts used a term for “saline ground” to classify soil fertility from about 2500 BCE, and surveys identify some such parcels as left uncultivated.

Farming included gardens, orchards and a range of crops. An Ur III expenditure account for employees lists barley, emmer, wheat and pulses, with another line specifying pulses and allium plants, members of the onion family. A mid-third-millennium text from Girsu, near Lagash, refers to “Susian flax,” evidence for flax cultivation in the region. Late third-millennium records and landscape studies place date palms in irrigated orchards alongside figs, grapes, pomegranates and apples.

Animals supplied labor and other resources. Oxen and cattle pulled plows; donkeys could also help prepare fields and carry loads. Sheep and goats provided wool and hair for textile production. Institutional herds supplied animals for workers, soldiers, gifts and religious offerings. Administrations employed overseers of fishers and fowlers, and records show fresh reeds collected from rural thickets as sheep fodder. One Ur III account lists rations for the young cattle of three plow teams alongside seed, hireling costs and work on a canal barrage.

Fields, tenants and grain allocations

Ur III accounts distinguish fields managed directly as domain land, land assigned to sustain personnel, and tenant land. These labels appear together in a multi-column barley account from the Umma region. It sorts grain by the land category it came from, records quantities and names recipients; another entry distinguishes grain from tenant land at the village threshing floor from grain recorded as domain produce. These categories shaped how harvests were accounted for.

Institutional estates operated alongside family-based production and exchange. Research on Ur III labor finds that adult male citizens owed temple institutions fifteen days of work each month in return for barley, wool and other goods; men of higher rank could receive use rights to plots as part of that relationship. In Lagash lease records, historian Piotr Steinkeller identifies rent set at one-third or one-half of a barley harvest, with an additional silver charge per unit of land due at the start of some agreements.

Other tablets make those relationships concrete. One Umma-region text records 1,200 litres of barley from a named rented field. A separate account for a royal estate associated with Princess Šat-Eštar tracks cultivated plots, seed and fodder, hireling costs, provisions for plow cattle, and barley used to pay workers on a canal barrage. The authors identify the estate as a likely royal property operating outside the provincial administration.