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

Table 1

C content of whole (not sieved) soils used for the fractionation trials.

Treatment	Abbreviation	Whole soil C (mg C·g^−1)
Nonamended bare plot control	BP	68.22 ± 2.23^e
Garden compost (full rate)	GCf	112.28 ± 5.66^c
Garden compost (half rate)	GCh	81.67 ± 7.98^d
Composted horse manure	H	145.86 ± 3.81^b
Peat	Pt	222.40 ± 1.64^a

Data are mean ± standard deviation (n = 3). Mean values not sharing a superscript letter are significantly different (; Tukey’s significant difference).