Plant height (cm) Samples 1-9
crude oil
concentration
1 2 3 4 5 6 7 8 9
0% 32.34a 31.60a              
2%     20.81a 7.98b 10.46b 5.42b 7.36b 9.54b 5.23b
3%     13.78a 7.44b 5.23bc 11.68a 6.98b 5.73bc 3.72c
4%     11.34a 7.03bc 8.52ab 6.98bc 8.11abc 9.24ab 5.04c
a, b, c................ within each row, means with the same letter are not significantly different p=0.05
Table 3: mean leaf area of A. hybridus treated with different crude oil concentrations.