Wheat is considered Zn-deficient if the shoot Zn
concentration is lower than 10–15 mg/kg dry weight
(Dang et al. 1993; Cakmak et al. 1996; Reuter and
Robinson 1997). Accordingly, in the soil experiment,
all plants grown at low Zn were either marginally low in
Zn or Zn-deficient whereas all grown at high Zn were
Zn-sufficient (Table 2). At low P, where the mycorrhizal
activity is particularly high in non-autoclaved soil
(Fig. 2), soil autoclaving dramatically reduced both
shoot and grain Zn concentrations (Tables 2 and 3).
The diminishing effect of soil autoclaving on tissue Zn Wheat is considered Zn-deficient if the shoot Zn
concentration is lower than 10–15 mg/kg dry weight
(Dang et al. 1993; Cakmak et al. 1996; Reuter and
Robinson 1997). Accordingly, in the soil experiment,
all plants grown at low Zn were either marginally low in
Zn or Zn-deficient whereas all grown at high Zn were
Zn-sufficient (Table 2). At low P, where the mycorrhizal
activity is particularly high in non-autoclaved soil
(Fig. 2), soil autoclaving dramatically reduced both
shoot and grain Zn concentrations (Tables 2 and 3).
The diminishing effect of soil autoclaving on tissue Zn