Fig. 3
Biplots obtained by PCA under charcoal production sites in Irele, Ipao, and Oke-Ako between the depths of 0–15, 15–30, and 30–45 cm. (a) Mbp, Bac, Fun, and Nem; (b) Phd, Phy, Tsd, and Drs; (c) Cu, Co, Fe, Mn and Zn.
Fig. 3 | Scientific Reports
