The Scientific World Journal / 2014 / Article / Tab 1

Research Article

Factors Controlling Carbon Metabolism and Humification in Different Soil Agroecosystems

Table 1

Chemical and physical properties at T1 and T2 sampling times. For each site, different letters indicate statistically different values among the treatments ( < 0.05).

TOC THC AHC TN WSCPorosity
g kg−1g kg−1g kg−1g kg−1g kg−1mm3 g−1

T1
Abanilla-SpainS-C 5.1b0.81b0.58b0.72b82a192b
S-WOF27.6a2.82a1.96a3.28a225b203a
Alberese-ItalyI-CA12.6b1.35b0.89b1.14b63b131b
I-BA18.7a1.93a1.35a1.38a70a147a
Puch-GermanyP-CA20.0a3.09a1.59a1.79a128a204a
P-IT10.3b2.05c1.13c0.80c98b161b
P-C11.5b2.45b1.34b0.98b96b160b

T2
Abanilla-SpainS-C5.9b0.91b0.52b0.75b76b198b
S-WOF24.0a2.63a1.49a2.52a154a217a
Alberese-ItalyI-CA13.1b1.38a0.69b0.81b46b142b
I-BA18.2a1.41a0.95a1.64a53a154a
Puch-GermanyP-CA17.3a2.56a1.58a1.53a75a210a
P-IT8.0c2.19c1.08c0.57c65b174b
P-C11.4b2.40b1.51a1.18b58c167b

TOC, total organic carbon; THC, total humic carbon; AHC, active humic carbon; TN, total nitrogen; WSC, water soluble carbon.
C, control; WOF, waste organic fraction added; CA, conventional agriculture; BA, organic agriculture; IT, intensive tillage. T1, initial sampling time; T2, one year later.