Section 1: Cycling of nitrogen in soil-plant systems --;1.1 Cycling of nitrogen in modern agricultural systems --;1.2 Nitrogen relationships in intensively managed temperate grasslands --;1.3 Components of the nitrogen cycle measured for cropped and grassland soil-plant systems --;1.4 The uptake of soil and fertilizer-nitrogen by barley growing under Scottish climatic conditions --;1.5 Leaching losses of nitrogen from a clay soil under grass and cereal crops in Finland --;1.6 Tillage effects on nitrogen uptake by maize from fine textured soils in the northwestern Corn Belt, USA --;Section 2: Microbial and animal effects on soil fertility --;2.1 The role of microorganisms in mediating and facilitating the uptake of plant nutrients from soil --;2.2 Earthworms and soil fertility --;2.3 Effect of lime, phosphorus and mycorrhizal fungi on growth, nodulation and nitrogen fixation by white clover (Trifolium repens) grown in UK hill soils --;2.4 Effect of liming on spore germination, germ tube growth and root colonization by vesicular-arbuscular mycorrhizal fungi --;Section 3: Measurements of microbial populations and biomass: their roles in soil processes --;3.1 Biological and biochemical analysis of soils --;3.2 Extractable N and P in relation to microbial biomass in UK acid organic soils --;3.3 Mineralization dynamics in fallow dryland wheat plots, Colorado --;3.4 Dynamics of soil microbial biomass N under zero and shallow tillage for spring wheat, using 15N urea --;3.5 Mineralization of C and N from microbial biomass in paddy soil --;3.6 Influence of plant roots on C and P metabolism in soil --;3.7 Response of soil microflora to moorland reclamation for improved agriculture --;Section 4: Anaerobic processes in soils and gaseous losses of nitrogen --;4.1 Anaerobic processes in soil --;4.2 Denitrification in field soils --;4.3 Total denitrification and the ratio between N2O, and N2 during the growth of spring barley --;4.4 Nitrite: a key compound in N loss processes under acid conditions? --;Section 5: Dynamics and models of organic carbon, nitrogen and phosphorus transformations in cultivated soils --;5.1 The biological transformation of P in soil --;5.2 Modelling C and N turnover through the microbial biomass in soil --;5.3 Dynamics of organic matter in soils --;5.4 Concepts of soil organic matter transformations in relation to organo-mineral particle size fractions --;5.5 A simple method for calculating decomposition and accumulation of 'young' soil organic matter --;Section 6: Interaction effects of organisms, organic matter and management on soil structure --;6.1 Interactions between biological processes, cultivation and soil structure --;6.2 Soil organic matter and structural stability: mechanisms and implications for management --;6.3 Influence of soil type, crop and air drying on residual carbohydrate content and aggregate stability after treatment with periodate and tetraborate --;6.4 Changes in soil structure and biological activity on some meadow hay plots at Cockle Park, Northumberland --;6.5 The effects on topsoil of long-term storage in stockpiles --;Section 7: Effects of noxious materials on biological processes in soils --;7.1. Effects of pesticides and heavy metals on biological processes in soil --;7.2 Microbial populations in trifluralin-treated soil --;7.3 Chemical disinfestation and metabolic integrity of soil --;Index of key words.
Meeting of Commissions III and IV of the International Society of Soil Science jointly with the British Society of Soil Science
Meeting of Commissions III and IV of the International Society of Soil Science jointly with the British Society of Soil Science