| The soil management systems cause changes to the aggregation and the stock of soil organic matter (SOM). The aim was to evaluate the influence of the winter cover crops and the tillage systems in aggregation and carbon (C) stock in soil and SOM fractions. The experiment started in 1986 at the Agronomic Institute of Paraná, in Pato Branco, in an Oxisol. The treatments are a combination of winter cover crops: black oat, rye, hairy vetch, common vetch, oilseed radish, blue lupine, wheat and fallow, and tillage systems: no tillage (NT) and conventional tillage (CT), in split plot design with three replications. Soil samples were collected in November 2012, in layers 0-5, 5-10 and 10-20 cm. In study 1, the aggregate stability were performed through wet sieving... |
