Treatment

Soaking time (minutes)

1

3

5

Control

3.37a

3.28a

2.38b

9:1 H2SO4

0.70d-g

0.60d-g

0.50d-g

7:3 H2SO4

1.39c-e

0.60d-g

0.40d-g

1:1 H2SO4

0.60d-g

1.19c-f

0.50d-g

4:6 H2SO4

2.38b

1.39c-e

1.49cd

3:7 H2SO4

2.38b

0.70d-g

0.90c-g

2:8 H2SO4

1.10c-g

0.40d-g

0.99c-g

1:9 H2SO4

1.89bc

1.19c-f

1.19c-f

SE (±) 0.36