Effect of ISPAD Anaerobic Digestion on Ammonia Volatilization from Soil Applied Swine Manure

Table 3

Fraction of the manure TAN volatilized in 47 hours of wind tunnel simulations for the five experimental soils and two manures, untreated (open tank) and anaerobically digested (ISPAD).

Soil type	Open tank manure		ISPAD manure		Average
	% manure	kg ha^−1	% manure	kg ha^−1	%	kg ha^−1
Washed sand	61.4 (2.4)	34 (1.3)	36.6 (3.5)	29 (2.8)	49.6	31.5
Upland Sandy Loam	38.2 (12.9)	21 (7.1)	16.4 (3.3)	13 (2.6)	27.3	17.0
Ormstown Loam	34.3 (7.9)	19 (4.4)	18.7 (8.0)	15 (6.4)	26.5	17.0
St Bernard Loam	33.0 (4.7)	19 (2.7)	24.7 (5.9)	20 (4.8)	28.8	19.5
Ste Rosalie Clay	25.0 (5.4)	14 (3.0)	7.8 (2.6)	6 (2.1)	16.4	10
Average	38.6	21.4	20.8	16.6

The standard deviation is presented in the parenthesis (𝑛=3).
The % value indicated the percentage of the TAN in the applied manure while the kg ha⁻¹ value indicates the mass volatilized.