Table 4.

Effect of nitrogen concentration on xylanase production

Nitrogen source	Concentration (g/L)	Xylanase activity (U/g dry substrate)
NaNO3	10	6512±110
	20	6934±92
	30	7746±118
	40	9543±59
	50	7464±68
Yeast extract	50	5502±95
	100	7109±62
	200	7642±130
	300	9432±200
	400	4579±64
Urea	10	6620±122
	20	7987±31
	30	9531±189
	40	7970±128
	50	4776±105