Sustainable Management of Soil Organic Matter

1. Organic matter and sustainability: critical levels of soil organic matter - the evidence for England and Wales; FT-IR studies on soil organic matter from long-term field experiments. 2. Modelling soil organic matter sustainabilityband agricultural management - predictions at the regional level; modelling of carbon dynamics in a rural area of central Germany; modelling variation in C and N loss and effects on N mineralization after grassland ploughing over a catchment; modelling decomposition of sugarcane surface residues and the impact on simulated yields; questionable assumptions in current soil organic matter transformation models; a procedure for isolating soil organic matter fractions suitable for modelling. 3. Soil organic matter management: the roles of residue quality in C sequestration and N supply: crop residue effects on soil C and N cycling under sugarcane; effect of residue quality on N2O emissions from tropical soils; evaluation of the soil organic matter dynamics model MOTOR, for predicting N immobilization/mineralization following field incorporation of paper mill sludge in a horticultural soil; organic matter management in practice - the potential to reduce pollution; carbon and nitrogen losses after ploughing out grass and grass-clover swards; fate and behaviour of organic contaminants during composting of municipal biowaste; the impact of changing farming practices on soil organic matter and soil structural stability of fen silt soils; crop management systems to conserve soil fertility after long-term setaside in southern Italy; modelling traditional manuring practices in the North Atlantic context - soil sustainability of a shetland Island community? organic matter and anthrosols in Amazonia: interpreting the amerindian legacy; persistence of soil organic matter in archaelogical soils (terra preta) of the brazilian amazon region; organic matter dynamics in soils of the former lake Texcoco, Mexico; low-input ecological rice farming in Bangladesh; the influence of cultivation on the composition and properties of clay-organic matter associations in soils; the influence of a grass-clover mixture on soil organic matter and aggregation of a podzolic loamy sand soil. 4. The role of soil organic matter and manures in sustainable nutrient cycling: can concepts of N saturation developed for forest systems be applied in arable soils? nitrogen mineralization under bare soils after the destruction of grazed pastures; dissolved organic nitrogen in a peaty podzol - influence of temperature and vegetation cover; dissolved organic nutrients (N, P and S) Shallow forest soils - fluxes and spectroscopic characterization; dissolved organic carbon losses from grazed grasslands; effects of sterilization and incubation temperature on formation and quality of dissolved organic matter in soils; nitrogen fluxes through sustainable farming systems in mid-hills of Nepal; N, P and K budgets for some UK organic farming systems - implications for sustainability; the effects of all-arable organic rotations on soil organic matter levels and the phosphorus and potassium status over the period 1987-1998; manure fertilization for soil organic matter maintenance and its effects upon crops and environment, evaluated in a long-term tril; effect of elevated CO2 and temperatue of soil C and N cycling; interactions between elevated CO2 and N in soils - influence on N2O fluxes and rhizosphere denitrifier activity; carbon mitigation options in agriculture - improving our estimates for Kyoto; soils and soil organic matter along a transect from central taiga to forest tundra, Siberia; carbon dynamics in upland soils after serious fires. 5. Implications of soil biodiversity for sustainable organic matter management: microbial catabolic evenness - a potential integrative indicator of organic matter management? DOK long-term farming systems trial - microbial biomass, activity and diversity affect the decomposition of plant residues; comparison of phenotypic, functional and genetic diversity of bacterial communities in soils; organic matter in restored soils as affected by earthworms and land use; rhizosphere effects on soil microbial biomass size and turnover in a soil of high an low fertility. 6. Soil teeming with life: new frotiers for soil science: sustaining soil organic matter.