Table 4.

The SUA (mg g⁻¹ 24 h⁻¹) in different irrigation amounts (W), fertilizer rates (F), and potato varieties (V) during S1, S2, S3, S4, and S5.

Treatments	Soil layer (cm)	S1	S2	S3	S4	S5
T1	0–20	0.42 abc	0.67 abc	0.57 ab	0.46 b	0.49 ab
	20–40	0.30 ab	0.41 ab	0.33 b	0.36 a	0.29 a
	40–60	0.26 ab	0.12 a	0.09 a	0.11 ab	0.11 ab
T2	0–20	0.43 abc	0.68 ab	0.60 ab	0.49 ab	0.51 ab
	20–40	0.33 ab	0.41 ab	0.36 ab	0.38 a	0.28 a
	40–60	0.25 ab	0.14 a	0.10 a	0.12 a	0.09 ab
T3	0–20	0.42 abc	0.64 bc	0.59 ab	0.47 b	0.51 ab
	20–40	0.30 b	0.36 b	0.34 b	0.36 a	0.23 a
	40–60	0.23 b	0.11 a	0.08 a	0.10 bc	0.11 ab
T4	0–20	0.43 ab	0.74 a	0.60 ab	0.50 ab	0.55 a
	20–40	0.35 ab	0.39 ab	0.36 ab	0.36 a	0.31 a
	40–60	0.28 ab	0.15 a	0.08 a	0.12 a	0.11 ab
T5	0–20	0.43 ab	0.74 a	0.61 a	0.54 a	0.52 ab
	20–40	0.34 ab	0.43 a	0.41 a	0.43 a	0.32 a
	40–60	0.30 a	0.16 a	0.09 a	0.12 ab	0.11 ab
T6	0–20	0.44 a	0.70 ab	0.60 ab	0.51 ab	0.52 ab
	20–40	0.36 a	0.44 a	0.41 a	0.42 a	0.29 a
	40–60	0.27 ab	0.14 a	0.08 a	0.13 a	0.11 a
T7	0–20	0.38 bc	0.66 bc	0.51 b	0.47 b	0.46 b
	20–40	0.32 ab	0.42 ab	0.33 b	0.38 a	0.27 a
	40–60	0.26 ab	0.15 a	0.09 a	0.11 abc	0.10 ab
T8	0–20	0.38 bc	0.67 abc	0.53 ab	0.54 a	0.49 ab
	20–40	0.31 ab	0.41 ab	0.40 a	0.39 a	0.24 a
	40–60	0.26 ab	0.14 a	0.07 a	0.10 bc	0.10 ab
T9	0–20	0.38 c	0.61 c	0.53 ab	0.49 ab	0.45 b
	20–40	0.30 b	0.44 a	0.42 a	0.40 a	0.25 a
	40–60	0.26 ab	0.12 a	0.09 a	0.09 c	0.09 b
	Significance test
W		**	**	*	**	**
F		ns	ns	ns	*	ns
V		ns	ns	ns	ns	ns

Different letters indicate significant difference at P < 0.05. ** indicates a remarkably significant difference (P < 0.01), * indicates a significant difference (P < 0.05), and ns indicates no significant difference (P > 0.05).