1. Labb, J. N., Oades, J. M. and Amato, M. 1981a Microbial biomass formed from14C,15N-labelled plant material decomposing in field soils. Soil Biology and Biochemistry (in press).
2. Ladd, J. N., Oades, J. M. and Amato, M. 1981b The distribution and recovery of nitrogen from legume residues decomposing in field soils sown to wheat. Soil Biology and Biochemistry (submitted for publication).
3. Paul, E. A. and van Veen, J. A. 1978 The use of tracers to determine the dynamic nature of organic matter. Proceedings 11th International Congress of Soil Science. 3, 1–43.