Advances in Soil Organic Matter Research. The Impact on by W S Wilson

By W S Wilson

The papers during this quantity offer a balanced account of advancements in soil natural topic study. It makes a speciality of composition and constitution, water caliber, natural subject turnover, humus caliber and fertility, and is vital examining for all these interested by the environmental points of soil conservation and development

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2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. P. A. R. M. L. Wershaw, and P. ), Wiley and sons, New York, 1985, Chapter 21, p. 527. B. Hayes, P. L. S. ), 'Humic Substances II—In Search of Structure', Wiley and Sons, Chichester, 1989. P. L. E. R. Bloom, 'Humic Substances in Soil and Crop Sciences-Selected Readings', P. MacCarthy, C E . L. R. ), American Society of Agronomy and Soil Science Society of America, Madison, 1990, Chapter 1. P. 1. A. Rice and P. MacCarthy, Organic Geochemistry, in Press.

Seidel, Phys. Lett. 1984, A106, 146, and also P. Hofer, A. Grupp and M. Mehring, Phys. , 1986, A33, 3519. 10. J. Sloop, T-S. Lin, J. Magn. , 1989, 82, 156. II. A. J. Duijvestijn, C. van der Lugt, J. Smidt, H. Vriend, Fuel, 1987, 66, 876. 12. A. V. Cheshire, J. Soil Sci. , 1976, 27, 337. 13. L. N. Wiley, New York, 1979 . 14. P. A. R. M. L. ), J. 558. A. Baldock, GJ. M. Oades D E P A R T M E N T O F SOIL SCIENCE. W A I T E A G R I C U L T U R A L RESEARCH INSTITUTE, T H E U N I V E R S I T Y OF A D E L A I D E , G L E N O S M O N D , SOUTH A U S T R A L I A 5064 1 INTRODUCTION In its broadest sense the term soil organic matter encompasses all organic materials contained in soil and can be viewed as a complex heterogeneous mixture o f living, dead and decomposing plant, animal and microbial tissues and detritus.

Advances in Soil Organic Matter Research 50 Table 5 Distribution of soil particles and organic carbon in the particle size and density fractions isolated from the Urrbrae soil. A. A. 4 C NMR of Millicent and Urrbrae Soils The composition of the organic carbon contained in the particle size and density fractions isolated from the Millicent and Urrbrae soils is shown in Fig. 1. For both soils, signals from all seven of the spectral ranges defined in Table 3 were observed. The coarser particle size fractions were dominated by signals originating from O-alkyl carbon presumably due to carbohydrate structures contained in plant fragements.

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