between 0.05 and 0.20 have been considered optimum,
levels below 0.05 do not necessarily mean that SBM
has been overheated (Waldroup et al., 1985; Araba and
Dale, 1990). According to Araba and Dale (1990), there
were 2 problems with the urease activity test; low levels
were not correlated with good chick performance and
urease activity of 0.00 ∆pH was not always an indication
of overheating.