Group Treatment %NaCl %FPH
I 1 0 0
2 0 7
3 0 10
4 0 14
II 5 0.2 0
6 0.2 7
7 0.2 10
8 0.2 14
III 9 0.6 0
10 0.6 7
11 0.6 10
12 0.6 14
IV 13 1.9 0
14 1.9 7
15 1.9 10
16 1.9 14
Table 4: Factorial design of experiments for response surface methodology.