Table 1.

Variables of fractional factorial design (2⁶⁻²) for used encapsulating agent mixtures in the formulation processes.

	Variables			Levels
				−1		+1
A	Lignin			Absent		2.5 g·L−1
B	Cellulose			Absent		2.5 g·L−1
C	Soy oil			Absent		2.5 g·L−1
D	Humic acid			Absent		2.5 g·L−1
E	Starch			Absent		2.5 g·L−1
F	Sodium alginate			Absent		0.1 g·L−1
Experiment	Coded levels
	A	B	C	D	E	F
1	−1	−1	−1	−1	−1	−1
2	+1	−1	−1	−1	+1	−1
3	−1	+1	−1	−1	+1	+1
4	+1	+1	−1	−1	−1	+1
5	−1	−1	+1	−1	+1	+1
6	+1	−1	+1	−1	−1	+1
7	−1	+1	+1	−1	−1	−1
8	+1	+1	+1	−1	+1	−1
9	−1	−1	−1	+1	−1	+1
10	+1	−1	−1	+1	+1	+1
11	−1	+1	−1	+1	+1	−1
12	+1	+1	−1	+1	−1	−1
13	−1	−1	+1	+1	+1	−1
14	+1	−1	+1	+1	−1	−1
15	−1	+1	+1	+1	−1	+1
16	+1	+1	+1	+1	+1	+1