The charred plant remains recovered from Jiaojia Site in 2016 provide abundant materials for researching agriculture and subsistence during Dawenkou culture and Han Dynasty.The result of 2016 flotation shows that in the middle and late period of Dawenkou,the dominance of agriculture has been established,and dry farming dominated by foxtail millet and broomcorn millet has been formed,at the same time,soybean and hemp were planted as well.Longshan culture basically continued the agricultural pattern of Dawenkou period.Millets planting further increased in YueShi culture,while soybean and wheat had no significant development.When it came to Han dynasty,foxtail millet still occupied absolute superiority as before,broomcorn millet declined obviously,soybean and wheat developed slowly.Gathering existed during the whole process as a supplement to agriculture,but the collection types and proportion tended to decrease with the change of times.
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