In order to develop methods for detecting evidence of this early stage of domestication we conducted a series of experiments cutting various wild and domesticated plants with stone tools, and analyzed the usewear traces and starch and phytolith residues on these tools. Previous studies have mainly focused on the morphological changes of millet grains for evidence of domesticity, but very few attempts have been made to understand the predomestication cultivation processes that predated morphological domestication and were likely involved with using certain harvesting methods. Chinese millets ( Setaria italica and Panicum miliaceum), first domesticated in north China, were among the most important East Asian crops in the past.
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