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

Table 5

C recovered from free particulate organic matter.

Treatment	Method
	PL	SO	ZM	Mean of treatment
BP	33.4 ± 0.1	21.5 ± 2.6	22.0 ± 5.3	25.6 ± 2.6D
GCf	73.4 ± 2.8	41.8 ± 6.7	65.2 ± 3.0	60.1 ± 5.2B
GCh	50.9 ± 5.4	40.2 ± 8.7	49.7 ± 2.6	46.9 ± 3.5C
H	72.6 ± 3.6	31.9 ± 4.3	66.0 ± 1.2	56.8 ± 6.5BC
Pt	94.2 ± 1.8	61.5 ± 5.3	62.8 ± 10.2	72.8 ± 6.3A
Mean of method	64.9 ± 5.7a	39.4 ± 4.2c	53.1 ± 4.9b

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 ).