Climate change, Agriculture, Crops, Age, Earth Sciences, Anthropology, Agronomy, Dispersal, Paleontology, Archaeology, Historic sites, Woody plants, Mountains, Phytoliths, Biogeosciences, Cultivation, Eurasian Steppe, Bronze Age, Millet, Barley, Xinjiang, Wheat, Depth profiling, Cereal crops, Herding, Historical metallurgy