Average plant height
Figure 1 indicated that all fractions except for C1 (at 20 ppm), C4 (at 20 ppm) and C5 (at 100 ppm) showed
positive effects. In comparison with the control, plant height of corn treated with all the fractions of chitosan
solution except for C1 (20 ppm), C4 (20 ppm) and C5 (100 ppm), were significantly taller than control. While the
fraction of C1 (at 20 ppm), C4 (at 20 ppm) and C5 (at 100 ppm) on plant height are shown no marked different from
control.