辽西地区城子山遗址和夏家店遗址农作物种子遗存研究显示, 城子山地区青铜时代中期以旱作农业种植为主, 粟的栽培要明显高于黍。青铜时代晚期的夏家店地区属半农半牧区, 存在黍与粟为主的旱作农业种植, 但黍的栽培比例要远高于青铜时代中期的城子山地区。干旱化可能是导致夏家店地区青铜时代晚期黍栽培比例升高的主要原因。城子山和夏家店地区农业种植结构在青铜时代晚期可能已有所不同, 但这2个地区农业种植的差异究竟从何时开始, 仍是一个需要继续深入研究的问题。

Study of charred cereal seeds collected by sieving and floating from Chengzis han and Xiajiadian sites in Western Liaoning Province indicated that the agriculture was dominated by rain- fed crops in the Middle Bronze Age in the Chengzishan site; as well, the proportion of cultivated foxtail millet was higher than that of broomcorn millet. The Xiajiadian site was a mixed economy of agriculture and pastoralism in the Late Bronze Age. The agriculture in the Xiajiadian site was also dominated by rain-f ed crops of foxtail and broomcorn millet, but the proportion of cultivated broomcorn millet was higher than that in the Chengzishan site (Middle Bronze Age). Drought may be responsible for the increase in broomcornmillet during the Late Bronze Age in the Xiajiadian area. The agriculture systemmay have differed in the Chengzishan and Xiajiadian sites during the Late Bronze Age, but more work is needed to determine the exact time of this differentiation.