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Effect of soil fumigation on soil pH. Soil pH after 15 days of fumigation (A) and after harvesting the crop (B) in the greenhouse experiment. Soil pH after 15 days of fumigation (C) and after harvesting the crop (D) in the field experiment. Significance difference among treatments (as described in Figure 1) is shown by different small letters on the error bar according to the least significant difference (LSD) test at p < 0.05.
