Table 3 Analysis of variance of tillage, mulch and saline irrigation on pH_s, EC_{e ,} Walkley and Black oxidizable organic C (WBOC) and KMnO₄oxidizable N, Olsen’s P and NH₄OAc extractable K, soil microbial biomass carbon and nitrogen (MBC and MBN), microbial biomass carbon nitrogen ratio (MBCN), dehydrogenase (DHA), alkaline phosphatase (AlK), urease (Ur), α- and β-glucosidase (α-/β glu), wheat grain and straw yield and weighted linear soil health index (SHI_IW); * P < 0.05, P < 0.01, * P < 0.001 and NS: not significant (P > 0.05).

Source	DF	pH_s	EC_e	OC	N	P	K	MBC	MBN	MBCN	DHA	AlP	URE	α-glu	β-glu	SHI_IW	Grain	Straw
Replication	2	NS	NS	NS	NS	NS	NS	*	NS	*	NS	NS	NS	NS	NS	NS	NS	NS
Year	1	NS	***	NS	NS	***	**	NS	**	**	NS	NS	*	NS	NS	*	NS	*
Tillage	2	NS	NS	NS	NS	*	*	NS	**	NS	NS	NS	NS	NS	NS	*	NS	*
Year × tillage	2	NS	NS	NS	NS	NS	NS	NS	***	NS	NS	NS	NS	NS	NS	NS	NS	NS
Error (a)	10
Irrigation	2	NS	***	NS	*	**	NS	**	*	NS	**	**	NS	NS	NS	*	NS	NS
Mulch	1	NS	**	NS	***	NS	*	NS	NS	NS	***	***	***	NS	NS	*	NS	*
Irrigation × mulch	2	*	NS	NS	NS	NS	NS	NS	NS	NS	NS	***	NS	NS	NS	NS	NS	NS
Year × irrigation	2	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS
Tillage × irrigation	4	NS	NS	NS	*	NS	NS	NS	NS	NS	NS	NS	*	NS	NS	NS	NS	NS
Year × tillage × irrigation	4	NS	NS	NS	NS	NS	**	NS	NS	NS	NS	*	**	NS	NS	NS	NS	NS
Year × mulch	1	NS	NS	NS	NS	*	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS
Tillage × mulch	2	NS	NS	NS	NS	NS	NS	NS	**	NS	NS	**	NS	NS	NS	NS	NS	NS
Year × tillage × mulch	2	NS	NS	NS	NS	NS	NS	NS	NS	*	NS	NS	***	NS	NS	NS	NS	NS
Year × irrigation × mulch	2	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	*	NS	NS	NS	NS	NS	NS
Tillage × irrigation × mulch	4	NS	NS	NS	*	**	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS
Year × tillage × irrigation × mulch	4	NS	NS	NS	NS	NS	*	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS	NS

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