Table 4.
Emission factor (EF) of particulate matter (PM₁₀, PM_2.5) and ammonia (NH₃) in different types of poultry houses

Poultry houses	PM₁₀ (kg/y/bird)	PM_2.5 (g/y/bird)	NH³ (kg/y/bird)
Floor-pen	0.19^a	15.62^a	0.20
Aviary	0.24^a	20.93^a	0.35
Cage	0.03^b	6.17^b	0.43
SEM¹	0.041	3.755	0.131
P-Value	<0.05	<0.05	0.1854

Standard error of means.
Means with different superscripts in the same column differ significantly (P<0.05).