Short-Term Response of Soil Organic Carbon Indices to Different Farming Strategies and Crop Rotation Systems in a Semiarid Warm Region

Table 3

Results of analysis of variance (ANOVA) presented using F-values and Pr > F (indicated by n.s, and ) for the effect of farming strategy (FS), crop rotation system (CR), and their interactions on the lability of C, lability index (LI), carbon pool index (CPI), and carbon management index (CMI).

Source	df	Lability of C	LI	CPI	CMI
Block	2	1.57^n.s	1.5^n.s	1.79^n.s	1.39^n.s
Farming strategy (FS)	2	0.2^n.s	0.19^n.s	7.9	5.3
Error FS (FS × block)	4	0.3	0.32	0.007	0.62
Crop rotation system (CRs)	3	0.38^n.s	0.38^n.s	8.29	3.07^ns
FS × CRs	6	0.3^n.s	0.33^n.s	1.14^n.s	0.86^n.s
Error	18	0.4	0.46	3	1.7
C.V		18	18	10	11

and indicate the significant level at and , respectively, and ^nsindicates to no statistically significant difference by the Duncan test based on the statistical design of the split-plot.