Table 2.

Required sample size for different factors.

Factors	Proportions (%) in different groups	Calculated sample size	Reference
Storage time	Up to 30 days (29.7%)	66	[14]
	31–90 days (66.6%)
Feed ingredient 1	Noug cake (58.3%)	78	[15]
	Wheat bran (25%)
Feed ingredient 2	Wheat bran (4.4%)	132	[14]
	Concentrate feed (22.5%)