Tillage and cropping system effects on soil humic acid characteristics as determined by electron spin resonance and fluorescence spectroscopies

Geoderma

Volumn 105, Issue 1-2, 2002, Pages 81-92

  Bayer, Cimélio ^a   Martin Neto, Ladislau ^b   Mielniczuk, João ^a   Saab, Sergio D C ^c   Milori, Débora M P ^b   Bagnato, Vanderlei S ^d  

^a FEDERAL UNIVERSITY OF RIO GRANDE DO SUL   (Brazil)

^b EMBRAPA CERRADOS   (Brazil)

^c STATE UNIVERSITY OF PONTA GROSSA   (Brazil)

^d UNIVERSITY OF SÃO PAULO   (Brazil)

Author keywords

Aromatic groups; Brazilian soils; Humification degree; Semiquinone free radicals

Indexed keywords

AGRICULTURAL SOIL; CROPPING PRACTICE; HUMIC ACID; TILLAGE;

BRAZIL;

VICIA; ZEA MAYS;

EID: 0036171794     PISSN: 00167061     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0016-7061(01)00093-3     Document Type: Article

References (28)

1. Effect of no-till cropping systems on SOM in a sandy clay loam Acrisol from Southern Brazil monitored by electron spin resonance and nuclear magnetic resonance
2. Organic matter storage in a sandy clay loam Acrisol affected by tillage and cropping systems in southern Brazil
3. Characterization by fluorescence of the dissolved organic matter in natural water: Application to fractions obtained by tangencial ultrafiltration and XAD resin isolation
4. Conformational arrangement of dissolved humic substances: Influence of solution composition on association of humic subtances
5. UV - Visible absorption and fluorescence properties of fulvic acids of microbial origin as functions of their molecular weights
6. Spectroscopic properties of dissolved humic substances - A reflection of land use in a fen area
7. Fluorescence spectroscopy of polynuclear aromatic compounds in environmental monitoring
8. Effects of cultivation on ESR spectra of organic matter from soil size fractions of a mollisol
9. Correlation of spectroscopic indicators of humification with mean annual rainfall along a temperate grassland climossequence
10. Soil humus characteristics in virgin and cleared areas of the Parana river basin in Brazil
11. Molecular size of humic substances. Supramolecular associations versus macromolecular polymers
12. Rank analysis of the pH-dependent synchronous fluorescence spectra of standard humic substances
13. Electron spin resonance spectrometry of humic substances
14. Characteristics of humic acids of some Venezuelan soils
15. Humic substances: Chemistry and reactions
16. Soil organic matter - The next 75 years
17. Electron spin resonance as a guide to the degree of humification peats
18. Molecular and quantitative aspects of the chemistry of fulvic acid and its interactions with metal ions and organic chemicals, Part I. The electron spin resonance approach
19. Molecular and quantitative aspects of the chemistry of fulvic acid and its interactions with metal ions and organic chemicals, Part I. The fluorescence spectroscopy approach
20. Chemistry and turnover of naturally occurring resistant organic compounds in soil
21. Model for humus
22. Investigations of paramagnetic species in peat
23. Differentiating with fluorescence spectroscopy the sources of dissolved organic matter in soils subjected to drying