Applicability of Ammonia Sensors for Controlling Environmental Parameters in Accommodations for Lamb Fattening

Table 5

Least square mean values of ammonia concentration (ppm) with respect to the height at which the probes were placed.

Variable	Height (cm)			SED	R^2ad	value
	50	90	135			Height	Week	H × W
NH3	7.9	5.6	4.5	0.11	0.31	<0.001	<0.001	<0.001

H: height; W: week. SED: standard error of the difference between means. Different superscripts (a, b, c) denote significant differences .