The essential trace elements Fe, Mn, Zn, Cu, and B in high concentrations can produce phytotoxicities. Iron toxicity resulted from 5 × 10‐4Mand 10‐3MFeSO4, but not from equivalent amounts of FeEDDHA (ferric ethylenediamine di (o‐hydroxyphenylacetic acid) ). Leaf concentrations in bush beans of 465μgMn/g, 291μgB/g, and 321μgZn/g all on the dry weight basis resulted in 27%, 45%, and 34% reduction in yields of leaves, respectively. Zinc was concentrated in roots while Mn and B concentrated in leaves. Solution concentrations of MnS04of 10‐3and 10‐2Mdepressed leaf yields of bush beans by 63% and 83%, respectively, with 5140 and 10780μgMn/g dry weight of leaves. Copper concentrations were simultaneously increased and those of Ca were decreased. Bush bean plants grown in Yolo loam soil with 200μgCu/g soil had a depression in leaf yield of 26% (with 28. 8μgCu/g leaf); plants failed to grow with 500μgCu/g soil. A level of 10‐3MH2MoO4was toxic to bush beans grown in solution culture. Leaves, stems, and roots, respectively, contained 710, and 1054, and 5920μgMo/g dry weight.