Factors Controlling Carbon Metabolism and Humification in Different Soil Agroecosystems

Table 3

Pyrolytic indices of mineralization (N/O) and humification (B/E₃). For each site, different letters indicate statistically different values among the treatments ( < 0.05).

		Whole soil		AHC extract
		N/O	B/E3	N/O	B/E3
Abanilla-Spain	S-C	1.49^a	0.547^b	1.21^a	0.581^b
	S-WOF	1.23^b	0.827^a	1.16^a	0.732^a
Alberese-Italy	I-CA	0.85^b	0.645^b	0.93^b	0.796^b
	I-BA	0.96^a	0.738^a	1.13^a	0.977^a
Puch-Germany	P-CA	1.39^a	0.930^a	1.28^a	0973^a
	P-IT	1.04^c	0.768^b	1.13^b	0.910^b
	P-C	1.25^b	0.765^b	1.31^a	0.911^b

N/O, furfural/pyrrole; B/E₃, benzene/toluene; AHC, active humic carbon.
C, control; WOF, waste organic fraction addition; CA, conventional agriculture; BA, organic agriculture; IT, intensive tillage. Data reported as mean values of T1 (initial sampling time) and T2 (one year later), coefficient of variation of the two sampling times ranging from 2 to 10%.