Fig. 2.The parameters of the Weibull model forE. coliO157:H7 survival in the test soils.td, time needed to reach detection limit, 100 colony forming units per gram of soil
dry weight;ı, the scale parameter represented the first decimal reduction time; p, the shape parameter. Bars are ±the standard errors of means of three replicates. The
different lower-case letters indicated significant differences atP≤0.05 and same ones indicated no significant differences (P> 0.05). The soil codes are the same as shown in
Table 2