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Isotope evidence for agricultural extensification reveals how the world's first cities were fed
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Journal Article
Isotope evidence for agricultural extensification reveals how the world's first cities were fed
2017
Overview
This study sheds light on the agricultural economy that underpinned the emergence of the first urban centres in northern Mesopotamia. Using δ
13
C and δ
15
N values of crop remains from the sites of Tell Sabi Abyad, Tell Zeidan, Hamoukar, Tell Brak and Tell Leilan (6500–2000 cal
bc
), we reveal that labour-intensive practices such as manuring/middening and water management formed an integral part of the agricultural strategy from the seventh millennium
bc
. Increased agricultural production to support growing urban populations was achieved by cultivation of larger areas of land, entailing lower manure/midden inputs per unit area—extensification. Our findings paint a nuanced picture of the role of agricultural production in new forms of political centralization. The shift towards lower-input farming most plausibly developed gradually at a household level, but the increased importance of land-based wealth constituted a key potential source of political power, providing the possibility for greater bureaucratic control and contributing to the wider societal changes that accompanied urbanization.
Carbon and nitrogen isotope measurements of crop remains from archaeological sites in northern Mesopotamia show labour-intensive practices such as manuring and water management forming an integral part of agriculture since the seventh millennium
bc
.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
