Table 1.

Different stimulus, plants species and number of data points (each capturing 11 statistical measures of 1000 samples) used for the present study.

stimulus	plant species used	concentration and application	no. data points
ozone (O3)	tomato/cucumber	16 ppm for a minute, every 2 h	1881
sulfuric acid (H2SO4)	tomato	5 ml of 0.05 mol H2SO4 in the soil once	496
sodium chloride (NaCl)—5 ml	tomato	5 ml of 3 mol NaCl solution in the soil once	812
sodium chloride (NaCl)—10 ml	tomato	10 ml of 3 mol NaCl solution in the soil once	612