Browsing by Author "Denef, K."

Now showing 1 - 3 of 3
  • Carbon Sequestration in microaggregates of no-tillage soils with different clay mineralogy
    Denef, K.; Six, J.; Merckx, R.; Paustian, Keith (Soil Science Society of America, 2004)
    This study compares the soil organic carbon (SOC) sequestration of three different soil types under no-tillage and conventional tillage. In all three soil types, soils under no-tillage had greater total SOC and greater C in microaggregates. More than 90% of the difference in total SOC between no-tillage and conventional tillage was attributable to the difference in microaggregate-associated C, regardless of clay mineralogy differences.
  • Soil aggregation and soil organic carbon stabilization: Effects of management in semiarid Mediterranean agro-ecosystems
    Álvaro-Fuentes, J.; Cantero-Martínez, C.; López, M. V.; Paustian, Keith; Denef, K.; Stewart, C. E.; Arrúe, J. L. (Soil Science Society of America, 2009)
    This study compared the combined and individual effects of three tillage systems and two cropping systems in a semiarid Mediterranean agroecosystem. The tillage systems were no-till (NT), reduced tillage (RT), and conventional tillage (CT); sites were cropped with either continuous barley or a barley-fallow system. Under both cropping systems, NT treatments had over 30% greater soil organic carbon (SOC) storage in the surface five cm of soil. The continuous barley treatment had greater SOC stabilization than the barley-fallow treatment only under no-till management. NT soils also showed a greater proportion of water stable macroaggregates. The authors conclude that the combined systems of no-till and fallow-suppression have the potential to increase stable SOC in the soil surface as well as improve overall soil structure and aggregation in the semiarid Mediterranean.
  • Soil organic matter, biota and aggregation in temperate and tropical soils: Effects of no tillage
    Six, J.; Feller, C.; Denef, K.; Ogle, F. M.; de Moraes Sa, J. C.; Albrecht, A. (EDP Sciences, 2002)
    This article compares soil properties of temperate and tropical soils under no-tillage. The soil properties evaluated include soil C turnover rate, SOM quality, aggregate stability, total C levels, CH4 uptake, and N2O emissions.