Variable

−α (1.68)

−1

0

+1

+α (1.68)

Substrate: ¹barley ²cassava

0¹:100²

30¹:70²

50¹:50²

80¹:20²

100¹:0²

pH

3.0

4.62

7.0

9.38

11.0

Temperature

20

23.2

28

32.8

36