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First evidence of farming in Mideast 23,000 years ago

Evidence of earliest small-scale agricultural cultivation

Date:
July 22, 2015
Source:
American Friends of Tel Aviv University
Summary:
Until now, researchers believed farming was 'invented' some 12,000 years ago in an area that was home to some of the earliest known human civilizations. A new discovery offers the first evidence that trial plant cultivation began far earlier -- some 23,000 years ago.
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Wild grasses including barley.
Credit: © Comugnero Silvana / Fotolia

Until now, researchers believed farming was "invented" some 12,000 years ago in the Cradle of Civilization -- Iraq, the Levant, parts of Turkey and Iran -- an area that was home to some of the earliest known human civilizations. A new discovery by an international collaboration of researchers from Tel Aviv University, Harvard University, Bar-Ilan University, and the University of Haifa offers the first evidence that trial plant cultivation began far earlier -- some 23,000 years ago.

The study focuses on the discovery of the first weed species at the site of a sedentary human camp on the shore of the Sea of Galilee. It was published in PLOS ONE and led by Prof. Ehud Weiss of Bar-Ilan University in collaboration with Prof. Marcelo Sternberg of the Department of Molecular Biology and Ecology of Plants at TAU's Faculty of Life Sciences and Prof. Ofer Bar-Yosef of Harvard University, among other colleagues.

"While full-scale agriculture did not develop until much later, our study shows that trial cultivation began far earlier than previously believed, and gives us reason to rethink our ancestors' capabilities," said Prof. Sternberg. "Those early ancestors were more clever and more skilled than we knew."

Evidence among the weeds

Although weeds are considered a threat or nuisance in farming, their presence at the site of the Ohalo II people's camp revealed the earliest signs of trial plant cultivation -- some 11 millennia earlier than conventional ideas about the onset of agriculture.

The plant material was found at the site of the Ohalo II people, who were fisher hunter-gatherers and established a sedentary human camp. The site was unusually well preserved, having been charred, covered by lake sediment, and sealed in low-oxygen conditions -- ideal for the preservation of plant material. The researchers examined the weed species for morphological signs of domestic-type cereals and harvesting tools, although their very presence is evidence itself of early farming.

"This uniquely preserved site is one of the best archaeological examples worldwide of the hunter-gatherers' way of life," said Prof. Sternberg. "It was possible to recover an extensive amount of information on the site and its inhabitants."

"Because weeds thrive in cultivated fields and disturbed soils, a significant presence of weeds in archaeobotanical assemblages retrieved from Neolithic sites and settlements of later age is widely considered an indicator of systematic cultivation," according to the study.

Early gatherers

The site bears the remains of six shelters and a particularly rich assemblage of plants. Upon retrieving and examining approximately 150,000 plant specimens, the researchers determined that early humans there had gathered over 140 species of plants. These included 13 known weeds mixed with edible cereals, such as wild emmer, wild barley, and wild oats.

The researchers found a grinding slab -- a stone tool with which cereal starch granules were extracted -- as well as a distribution of seeds around this tool, reflecting that the cereal grains were processed for consumption. The large number of cereals showing specific kinds of scars on their seeds indicate the likelihood of those cereals growing in fields, and the presence of sickle blades indicates that these humans deliberately planned the harvest of cereal.

The new study offers evidence that early humans clearly functioned with a basic knowledge of agriculture and, perhaps more importantly, exhibited foresight and extensive agricultural planning far earlier than previously believed.


Story Source:

The above post is reprinted from materials provided by American Friends of Tel Aviv University. Note: Materials may be edited for content and length.


Journal Reference:

  1. Ainit Snir, Dani Nadel, Iris Groman-Yaroslavski, Yoel Melamed, Marcelo Sternberg, Ofer Bar-Yosef, Ehud Weiss. The Origin of Cultivation and Proto-Weeds, Long Before Neolithic Farming. PLOS ONE, 2015; 10 (7): e0131422 DOI: 10.1371/journal.pone.0131422

Cite This Page:

American Friends of Tel Aviv University. "First evidence of farming in Mideast 23,000 years ago: Evidence of earliest small-scale agricultural cultivation." ScienceDaily. ScienceDaily, 22 July 2015. <www.sciencedaily.com/releases/2015/07/150722144709.htm>.
American Friends of Tel Aviv University. (2015, July 22). First evidence of farming in Mideast 23,000 years ago: Evidence of earliest small-scale agricultural cultivation. ScienceDaily. Retrieved July 26, 2016 from www.sciencedaily.com/releases/2015/07/150722144709.htm
American Friends of Tel Aviv University. "First evidence of farming in Mideast 23,000 years ago: Evidence of earliest small-scale agricultural cultivation." ScienceDaily. www.sciencedaily.com/releases/2015/07/150722144709.htm (accessed July 26, 2016).

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