Soil Organic Matter Management: The Roles of Residue Quality in C Sequestration and N Supply - Sustainable Management of Soil Organic Matter - page 125

of an N-rich residue (C:N=10) is 50% faster with 15 bacterivorous
nematodes per g of soil than with three nematodes per g of soil.

Conclusion

MOTOR simulated the peak amount of C and N immobilized in biomass
following PMS application in June 1996 well, but the prediction of the
timing of the peak N immobilization was up to 3 weeks early. We suggest
that shortage of soil mineral N, physical accessibility of substrate and
level of initial soil biological activity affected the kinetics of C and N
immobilization/mineralization.

Acknowledgements

The senior author would like to thank Scottish Executive Rural Affairs
Department (SERAD) for funding the work, OECD for a fellowship to
work at the AB-DLO Institute for Soil Fertility, Wageningen during 1999
under the Biological Resource Management for Sustainable Agricultural
Systems

Programme, and the staff at AB-DLO for their help and

encouragement.

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