Tillage Effects on Spatiotemporal Variability of Particulate Organic Matter

Table 5

Wheat-derived C and proportion of wheat-derived C/total fraction C in POM fractions under standard tillage and no-till in the first eight months of study.

	Standard tillage			No-till
Fraction	>1000 𝜇m	250–1000 𝜇m	53–250 𝜇m	>1000 𝜇m	250–1000 𝜇m	53–250 𝜇m
Soil POM-Cnew (g C m^-2)
Mean	3.3	8.0	14.0	2.6	11.3	10.1
Maximum	8.5	27.6	28.8	7.0	29.4	28.8
Minimum	0.1	0.5	0.3	0.2	0.3	0.2
CV^†	65	73	53	79	60	75
Skewness^‡	0.40	1.43	0.22	0.97	0.67	0.95
Soil POM-Cnew/POM-C (%)
Mean	32.9	15.2	12.4	17.5	14.9	7.3
Maximum	66.6	32.2	23.6	49.2	33.1	19.2
Minimum	1.7	1.9	0.2	0.5	0.6	0.2
CV	56	60	52	80	52	71
Skewness	-0.10	0.40	−0.11	0.84	0.27	0.65

^†CV: coefficient of variation (%).
^‡Skewness indicates the degree of asymmetry of a distribution.