A Comparison of Physical Soil Organic Matter Fractionation Methods for Amended Soils

Table 6

Aggregate OM recovery.

Treatment	Method
	PL	SD	SMI	SO	ZM	Mean of treatment
BP	15.7 ± 2.1	56.1 ± 6.4	43.6 ± 1.8	10.3 ± 5.8	34.8 ± 3.2	32.1 ± 4.8B
GCf	17.5 ± 3.2	69.8 ± 1.3	73.1 ± 2.2	33.4 ± 5.5	12.2 ± 1.3	41.2 ± 7.0A
GCh	28.9 ± 7.0	61.1 ± 0.3	79.7 ± 1.1	43.2 ± 4.8	15.6 ± 1.3	45.7 ± 6.3A
H	16.0 ± 3.3	77.2 ± 4.2	47.4 ± 2.5	7.7 ± 1.3	12.5 ± 0.7	32.2 ± 7.2B
Pt	4.9 ± 1.8	89.3 ± 0.3	62.1 ± 1.2	33.9 ± 6.0	18.0 ± 7.0	41.6 ± 8.3A
Mean of methods	16.6 ± 2.5d	70.7 ± 3.4a	61.2 ± 3.8b	25.7 ± 4.2c	18.6 ± 2.6cd

Values are expressed as a percentage of total C recovered. Mean ± standard error (n = 3). Lowercase letters in the bold values signify methods that are not significantly different, and uppercase letters signify treatments that are not significantly different according to two-way ANOVA with Tukey’s post hoc testing (). Method  treatment interactions ().