IMPACT4SOIL OpenAire HAL INRAE Crossref Microsoft Academic Graph Geoderma Closed Access 2011-07-23 2020-05-29 article i nfo Under long-term cultivation, greater accumulations of soil organic matter (SOM) and phosphorus (P) are found in the surface soil layer under no-till (NT) versus mouldboard ploughing (MP) practices. Our objective was to evaluate the effects of NT and MP practices on concomitant SOM and P distribution and sorption characteristics among water-stable aggregates and non-aggregated particles. The study was conducted in Quebec, Canada, as part of a long-term corn and soybean rotation experiment (established since 1992) on a clay loam soil of the St-Blaise series (Dark Grey Gleysol). Soil samples were collected in the fall of 2007 in the 0-5 cm layer from plots under NT and MP receiving 35 kg P ha -1 and 160 kg N ha -1 . Samples were separated into three water-stable aggregate-sized classes (macro, 2000-250 μm; meso, 250-180 μm; micro, 180- 53 μm) and (silt+clay)-sized particles (b53 μm) using wet-sieving. Macro aggregates made up 60.2 and 48.5% of total soil weight under NT and MP, respectively. In wet-sieved soils from NT plots, water-extractable P (Pw) concentration increased in the order (silt+clay)-sized particlesbmicro-bmeso-bmacro-aggregates; under MP, micro-, meso-, and macro-aggregate fractions had the same Pw concentration, while the (silt+clay)- sized particles showed the lowest Pw concentration. The hierarchy observed among aggregate-sized classes 2. Zero hunger ORGANIC CARBON [SDV.EE] Life Sciences [q-bio]/Ecology, environment SOL ARGILO-LIMONEUX MOULDBOARD PLOUGHING SOIL AGGREGATION 0401 agriculture, forestry, and fisheries NO TILL 04 agricultural and veterinary sciences PHOSPHORUS DYNAMICS 15. Life on land 6. Clean water Aimé J. Messiga, Aimé J. Messiga, Noura Ziadi, Denis A. Angers, Christian Morel, Léon-E. Parent, 2011-09-01 journalpaper article i nfo Under long-term cultivation, greater accumulations of soil organic matter (SOM) and phosphorus (P) are found in the surface soil layer under no-till (NT) versus mouldboard ploughing (MP) practices. Our objective was to evaluate the effects of NT and MP practices on concomitant SOM and P distribution and sorption characteristics among water-stable aggregates and non-aggregated particles. The study was conducted in Quebec, Canada, as part of a long-term corn and soybean rotation experiment (established since 1992) on a clay loam soil of the St-Blaise series (Dark Grey Gleysol). Soil samples were collected in the fall of 2007 in the 0-5 cm layer from plots under NT and MP receiving 35 kg P ha -1 and 160 kg N ha -1 . Samples were separated into three water-stable aggregate-sized classes (macro, 2000-250 μm; meso, 250-180 μm; micro, 180- 53 μm) and (silt+clay)-sized particles (b53 μm) using wet-sieving. Macro aggregates made up 60.2 and 48.5% of total soil weight under NT and MP, respectively. In wet-sieved soils from NT plots, water-extractable P (Pw) concentration increased in the order (silt+clay)-sized particlesbmicro-bmeso-bmacro-aggregates; under MP, micro-, meso-, and macro-aggregate fractions had the same Pw concentration, while the (silt+clay)- sized particles showed the lowest Pw concentration. The hierarchy observed among aggregate-sized classes Tillage Practices Of A Clay Loam Soil Affect Soil Aggregation And Associated C And P Concentrations 10.1016/j.geoderma.2011.06.014 https://doi.org/10.1016/j.geoderma.2011.06.014