Figure 5

Density of charcoal, Chenopodium, Astragalus, barley and millet in F1 (the base map is Fig. 2, and the distribution of density is calculated and illustrated by D.T. using ArcGIS 10.6 https://www.esri.com).

Density of charcoal, Chenopodium, Astragalus, barley and millet in F1 (the base map is Fig. 2, and the distribution of density is calculated and illustrated by D.T. using ArcGIS 10.6 https://www.esri.com).