Table Of Content

Contents of Agriculture, Ecosystems and Environment, Volume 40 Vol. 40 Nos. 1—4 May 1992 Special Issue: Biotic diversity in agroecosystems Introduction Agroecosystem biodiversity: matching production and conservation biology M.G. Paoletti (Padua, Italy), D. Pimentel, B.R. Stinner (Ithaca, NY, USA) and D. Stinner (Wooster, OH, USA) A review: long-term effects of agricultural systems on soil biochemical and microbial parameters R.P. Dick (Corvallis, OR, USA) Biodiversity of microarthropods in agricultural soils: relations to processes D.A. Crossley, Jr. (Athens, GA, USA), B.R. Mueller (Ulm, Germany) and J.C. Perdue (Swainsboro, GA, USA) Macrochelid mites (Acari: Mesostigmata) occurring in animal droppings in the pasture ecosystem in central Italy B. Cicolani (L’ Aquila, Italy) 47 Modifying traditional and high-input agroecosystems for optimization of microbial symbioses: a case study of dry beans in Costa Rica Grassy field margins and arthropod diversity: a case study on ground beetles and spiders in eastern Austria (Coleoptera: Carabidae; Arachnida: Aranei, Opiliones) B. Krom (Vienna, Austria) and K.-H. Steinberger (Inssbruck, Austria) Field margins: can they enhance natural enemy population densities and general arthropod diversity on farmland? P. Dennis and G. Fry (Aas, Norway) Margins of agricultural fields as habitats for pollinating insects J. Lagerl6f, J. Stark and B. Svensson (Uppsala, Sweden) Farming systems and insect predators C.J.H. Booij and J. Noorlander (Wageningen, Netherlands) Some comparative insect conservation issues of north temperate, tropical and south temperate landscapes M.J. Samways (Pitermaritzburg, South Africa) Effects of headland management on invertebrate communities in cereal fields M. Hassall, A. Hawthorne, M. Maudsley (Norwich, UK), P. White (Bristol, UK) and C. Cardwell (Sheffield, UK) Strategy for conservation of wild bees in an agricultural landscape J. Banaszak (Chodkiewicza, Poland) The use of soil mesofauna for the judgement of chemical impact on ecosystems H.H. Koehler (Bremen, Germany) Comparative studies on the soil life in ecofarmed and conventionally farmed fields and grasslands of Austria W. Foissner (Salzburg, Austria) Conserving the species-rich meadows of Europe A. Garcia (Le6n, Spain Forage legumes and cultural sustainability: lessons from history D.H. Stinner, B.R. Stinner (Wooster, OH, USA) and I. Glick (Lancaster, PA, USA) Subterranean clover living mulch: an alternative method of weed control R.D. IInicki and A.J. Enache (New Brunswick, NJ, USA) Alternative crops for sustainable agricultural systems R. Becker, R.M. Saunders (Albany, CA, USA), D. Meyer (Zug, Switzerland), P. Wagoner (Emmaus, PA, USA) Brazilian rain forest colonization and biodiversity E.E. De Miranda and C. Mattos (Campinas, Brazil) Conserving invertebrate diversity in agricultural, forestry and natural ecosystems in Australia P. Greenslade (Canberra, ACT, Australia) Tanzania's vanishing rain forests — assessment of nature conservation values, biodiversity and importance for water catchment J.E. Bjorndalen (Morogoro, Tanzania) Diversity of mammals and traditional hunting in central African rain forests Author Index