Ammonia Volatilization Losses from Paddy Fields under Controlled Irrigation with Different Drainage Treatments

Table 2

Ammonia volatilization losses from CWT1, CWT2, and CWT3.

Treatment	AV losses (kg N ha^−1)				Ratio of AV losses to applied 𝑁 (%)
	During a week after fertilization			Seasonal	During a week after fertilization			Seasonal
	BF II	TF	PF		BF II	TF	PF
CWT1	14.5 (0.4)^ab	17.4 (1.1)^a	7.6 (0.1)^a	59.8 (2.5)^a	22.4 (0.6)^ab	14.2 (0.9)^a	8.7 (0.1)^a	18.8 (0.8)^a
CWT2	15.1 (0.4)^a	15.2 (2.1)^a	7.0 (1.1)^a	56.7 (3.1)^ab	23.4 (0.6)^a	12.4 (1.8)^a	8.0 (1.3)^a	17.8 (1.0)^ab
CWT3	13.0 (1.5)^b	15.7 (1.6)^a	4.9 (0.7)^b	53.0 (1.3)^b	20.2 (2.4)^b	12.9 (1.3)^a	5.7 (0.8)^b	16.3 (0.4)^b

Means in the same column followed by the same letter are not significantly different (𝑃<0.05) by LSD.
Numbers in parenthesis are standard deviation.