1987
DOI: 10.4141/cjss87-016
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COMPARISON OF 13C CPMAS NMR AND CHEMICAL TECHNIQUES FOR MEASURING THE DEGREE OF DECOMPOSITION IN VIRGIN AND CULTIVATED PEAT PROFILES

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Cited by 94 publications
(56 citation statements)
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“…The Urrbrae Alfisol contained more alkyl carbon and less O-alkyl and aromatic carbon than the Meadows Alfisol. The changes observed between the two Alfisols were similar to those induced by cultivating a Histosol for 15 years (Preston et al 1987). Since cultivation has been demonstrated to promote the decomposition of soil organic materials, the changes were presumed to indicate that the organic materials contained in the Urrbrae Alfisol were decomposed to a greater extent than that contained in the Meadows Alfisol.…”
Section: Type Of Carbonsupporting
confidence: 82%
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“…The Urrbrae Alfisol contained more alkyl carbon and less O-alkyl and aromatic carbon than the Meadows Alfisol. The changes observed between the two Alfisols were similar to those induced by cultivating a Histosol for 15 years (Preston et al 1987). Since cultivation has been demonstrated to promote the decomposition of soil organic materials, the changes were presumed to indicate that the organic materials contained in the Urrbrae Alfisol were decomposed to a greater extent than that contained in the Meadows Alfisol.…”
Section: Type Of Carbonsupporting
confidence: 82%
“…The estimated composition of the entire organic carbon fraction contained in each of the soils included in this study is shown in Fig. 9a, while that estimated for the Urrbrae Alfisol ) and Meadows Alfisol (Baldock unpublished) and the composition of uncultivated and cultivated Ormstown Histosol (Preston et al 1987) are presented in Fig. 9b.…”
Section: Whole Soilsmentioning
confidence: 95%
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“…doi:10. 1016/j.geoderma.2004.12.004 exceeds 10% of total organic C. In lower mineral horizons, where the content of organic matter is low, the lipid fraction can comprise more than 40% of C total (Preston et al, 1987). Most agriculturally important soils have lipid contents that range from 1.2% to 6.3% of the total organic matter (Stevenson, 1992).…”
Section: Introductionmentioning
confidence: 97%
“…They noted that there were significant differences in soil organic carbon (SOC) content but not in chemical composition obtained with solid-state 13 C-NMR. On the other hand, Preston et al (1987) found a decrease in OC and carbohydrate contents and an increase of the aliphatic and methoxyl concentrations in peat soils with increasing cultivation. More recently, Capriel et al (1992) studied several cultivation systems on a luvisol soil derived from loess loam of Bavaria and found twofold differences in the OC content of the plots studied but similar solution 13 C-NMR and Fourier transformed infrared (FTIR) spectra of the humic and fulvic acids.…”
mentioning
confidence: 88%