Main effects table during the experimental periods of 2009.

Difference among species, drought-rewetting-drought periods (1 = at the end of 1stD period, 2 = after RW period and 3 = at the end of 2ndD period) or differences versus control (± %) or calcareous versus acidic soil (± %); significant difference:(*) P ≤ 0.1,* P ≤ 0.05,** P ≤ 0.01,*** P ≤ 0.001;ns = not significant P > 0.05;na = not available, because foliar K concentrations were determined only at the end of 2ndD period.Main effects table during the experimental periods of 2009.