Figure 3

Radar plots showing the difference of geographical origins in term of mean concentrations of elements (K, P, Mg, Fe, Na, Sr, B, and Mo) in various cultivated P. tenuifolia samples (A. Shanxi, B. Henan, C. Shaanxi and D. Hebei province) and geographical origin in term of relative concentrations of elements (K, P, Mg, Fe, Na, Sr, B, and Mo) in 32 cultivated P. tenuifolia samples from different regions of Shanxi province (E).