Plant and Soil 170: 385-388, 1995. Contents Volume 170 (1995) THE SIGNIFICANCE AND REGULATION OF SOIL BIODIVERSITY SELECTED PAPERS FROM THE PROCEEDINGS OF THE INTERNATIONAL SYMPOSIUM ON SOIL BIODIVERSITY May 3-6, 1993, Michigan State University, East Lansing, Michigan, USA Guest Editors: H.P. COLLINS, G.P. ROBERTSON and M.J. KLUG Preface BIODIVERSITY AND ECOSYSTEM PROCESSES A hierarchical approach to evaluating the significance of soil biodiversity to biogeochemical cycling M.H. Beare, D.C. Coleman, D.A. Crossley Jr., P.F. Hendrix, E.P. Odum Mutualism and biodiversity in soils P. Lavelle, C. Lattaud, D. Trigo, I. Barois The detritus food-web and the diversity of soil fauna as indicators of disturbance regimes in agro-ecosystems D.A. Wardle, G.W. Yeates, R.N. Watson, K.S. Nicholson MICROBIAL POPULATION DYNAMICS Patterns and regulation of mycorrhizal plant and fungal diversity E.B. Allen, M.F. Allen, D.J. Helm, J.M. Trappe, R. Molina, E. Rincon Thoughts on the processes that maintain local species diversity of ectomycorrhizal fungi T.D. Bruns Soil microbial diversity and the sustainability of agricultural soils A.C. Kennedy, K.L. Smith The functional significance of the microbial biomass in organic and conventionally managed soils M.M. Wander, D.S. Hedrick, D. Kaufman, S.J. Traina, B.R. Stinner, S.R. Kehrmeyer, D.C. White Fatty acid methyl ester (FAME) profiles as measures of soil microbial community structure 99-113 M.A. Cavigelli, G.P. Robertson, M.J. Klug Discrimination of microbial diversity by fatty acid profiles of phospholipids and lipopolysac- 115-122 charides in differentiy cultivated soils L. Zelles, R. Rackwitz, Q.Y. Bai, T. Beck, F. Beese Effects of previous intensive agricultural management on microorganisms and the biodiversity of soil fauna J. Filser, H. Fromm, R.F. Nagel, K. Winter 386 Divergence of mycorrhizal fungal communities in crop production systems 131-140 J.W. Hendrix, B.Z. Guo, Z.-Q. An The role of glutamine synthetase in regulation of nitrogen metabolism within the soil microbial 141-147 community G.W. McCarty Decomposition and nitrogen release from leaves of three hardwood species grown under 149-157 elevated O3 and/or CO: R.E.J. Boerner, J. Rebbeck Interpreting soil ciliate biodiversity S.S. Bamforth SOIL FAUNAL RELATIONSHIPS Measures of nematode community structure and sources of variability among and within 167-181 agricultural fields D.A. Neher, S.L. Peck, J.O. Rawlings, C.L. Campbell Relationships among microarthropods, fungi, and their environment J.N. Klironomos, B. Kendrick Population dynamics and functional roles of Enchytraeidae (Oligochaeta) in hardwood forest and agricultural ecosystems P.C.J. van Vliet, M.H. Beare, D.C. Coleman How do earthworms affect microfloral and faunal community diversity? G.G. Brown Earthworm community structure and diversity in experimental agricultural watersheds in Northeastern Ohio P.J. Bohlen, W.M. Edwards, C.A. Edwards Research articles Competition for ammonium between plant roots and nitrifying and heterotrophic bacteria and the effects of protozoan grazing F.J.M. Verhagen, H.J. Laanbroek, J.W. Woldendorp Root and leaf attributes accounting for the performance of fast- and slow-growing grasses at different nutrient supply P. Ryser, H. Lambers Effects of enhanced atmospheric CO, and nutrient supply on the quality and subsequent decomposition of fine roots of Betula pendula Roth. and Picea sitchensis (Bong.) Carr. M.F. Cotrufo, P. Ineson Reaction of incompatible isolate of Pyricularia grisea on rice leaves stripped of epicuticular wax reflects blast conduciveness of soils U.S. Singh, R.S. Zeigler, J.M. Bonman Temporal changes in soil microbial biomass carbon in an arable soil and consequences for soil sampling E.-A. Kaiser, R. Martens, O. Heinemeyer Root length dynamics in agroforestry with Gliricidia sepium as compared to sole cropping in the semi-deciduous rainforest zone of West Africa G. Schroth, W. Zech Methane emission from a wetland rice field as affected by salinity H.A.C. Denier van der Gon, H.-U. Neue Radiocaesium in an organic soil and the effect of treatment with the fungicide ‘Captan’ C.A. Shand, M.V. Cheshire, S. Smith, C.D. Campbell, P. Anderson, C.M. Davidson, D. Littlejohn, N. Jamieson Interaction between the root-lesion nematode Pratylenchus vulnus and the mycorrhizal association of Glomus intraradices and Santa Lucia 64 cherry rootstock J. Pinochet, C. Calvet, A. Camprubi, C. Fernandez Response of irrigated mulberry (Morus alba L.) to VA-mycorrhizal inoculation under graded doses of phosphorus R.S. Katiyar, P.K. Das, P.C. Choudhury, A. Ghosh, G.B. Singh, R.K. Datta The significance of antibiotic production by Pseudomonas aureofaciens PA147-2 for biological control of Phytophthora megasperma root rot of asparagus F.L. Carruthers, T. Shum-Thomas, A.J. Conner, H.K. Mahanty Loss of exudates from the roots of perennial ryegrass inoculated with a range of micro- organisms A.A. Meharg, K. Killham Symbiotic effectiveness of Rhizobium meliloti of low root temperature W.A. Rice, P.E. Olsen, M.M. Collins Effects of timing and supply of nitrogen on nitrogen remobilization from vegetative organs and redistribution to developing seeds of sunflower P.J. Hocking, B.T. Steer Expression of Frankia nif genes in nodules of Alnus glutinosa 371-376 K. Pawlowski, A.D.L. Akkermans, Ab van Kammen, T. Bisseling Short Communication Leaf development and phenology of Triticum eastivum and T. durum under different moisture regimes M.G. Mosaad, G. Ortiz-Ferrara, V. Mahalakshmi, J. Hamblin Announcements Contents volume 170 (1995) Author index instructions to authors (1995)