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dc.creatorGalantini, J.A. (Juan A.)-
dc.creatorDuval, M. (Matías)-
dc.creatorMartínez, J.M. (Juan M.)-
dc.creatorMora, V. (Verónica)-
dc.creatorBaigorri, R. (Roberto)-
dc.creatorGarcía-Mina, J.M. (José María)-
dc.identifier.citationGalantini, J. A.; Duval, M.; Martinez, J. M.; et al. "Quality and quantity of organic fractions as affected by soil depth in an Argiudoll under Till and No-till systems". International Journal of Plant and Soil Science. 10 (5), 2016, 1 - 12es
dc.description.abstractAims: The aim of this study was to evaluate the long-term effect of tillage systems on the quantity and quality of organic carbon fractions at different soil layers. Study Design: The experimental design was a split plot with three blocks. The long-term effects (25 years) of conventional- (CT) and no-tillage (NT) systems on a Tipic Argiudoll was sampled at 0-5, 5-10, 10-15 and 15-20 cm soil depth. Place and Duration of Study: The field experiment was carried out at Tornquist (38° 07' 06'' S - 62°02' 17'' O) and soil sampling was performed during wheat seeding (June 2011). Methodology: Total soil organic carbon (SOC) content and the following fractions were determined: Coarse particulate (POCc, 105-2000 µm), fine particulate (POCf, 53-105 µm) and mineral-associated (MOC, 0-53 µm) carbon fractions; humic (HA) and fulvic (FA) acids; and total (CHt) and soluble (CHs) carbohydrates. The main physico-chemical properties of HA and FA were analyzed using both FT-IR and fluorescence spectroscopies. Results: After 25 years, total SOC at the 0-20 cm depth was 9% higher in no-tilled than in tilled soils. The POCf was the SOM fraction that turned out to be the most sensitive to tillage effects. The POCc:POCf:MOC ratio at 0-20 cm was similar for NT (3:14:82) and CT (5:10:84); however, differences were found across soil depths. Tilled soils showed higher aromaticity, starting by CH-degradation, in more superficial soil layers.-
dc.description.sponsorshipThe authors wish to thank AAPRESID-Regional Bahía Blanca. We would also like to give special thanks to Hogar Funke, where the sampling was carried out, and to the BIOSPAS project (BID 1728 OC-AR 36976 PAE/PID 53).-
dc.subjectTillage system-
dc.subjectSoil organic carbon-
dc.subjectChemical and physical fractionation-
dc.titleQuality and quantity of organic fractions as affected by soil depth in an Argiudoll under Till and No-till systems-
dc.description.noteThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0)-
dadun.citation.publicationNameInternational Journal of Plant and Soil Science-

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