The salinities of the soil layers in the T.-soil columns were 2.4, 1.3, 1.1, and 1.2 (from top to bottom) times those of the bottom layers at 50 cm (0.48%), and the salinities of the soil layer in the control soils were 3.9, 2.4, 1.9, and 1.3 (from top to bottom) times those of the bottom layers at 50 cm (0.35%)