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  • Soil aggregation, aggregate stability, organic carbon and nitrogen in different soil aggregate fractions under forest and shrub vegetation on the Loess Plateau, China
  • Aggregate ; Carbon ; China ; Geophysics ; Land use ; Loess ; Microstructure ; Nitrogen ; Plateau ; Soil properties ; Vegetation
  • The AA. presumed that the aggregate stability and the distribution of organic carbon and nitrogen in different aggregate fractions were different and would be affected by different plant communities in comparison to cropland and bare fallow land
  • . Therefore, the aims of this study were to elucidate the effects of different plant communities on soil aggregate stability and the distribution of organic carbon and nitrogen in different aggregate fractions by using ultrasonic method, both in old forest
  • areas and in new afforestation areas, in order to prove that the different plant covers enhance soil aggregate stability. Soil samples were collected from the hilly-gully area on the Loess Plateau : results and discussion.
  • 2010
  • Interrill erosion from disturbed and undisturbed samples in relation to topsoil aggregate stability in red soils from subtropical China
  • Aggregate ; Agropedology ; China ; Erodibility ; Erosion rate ; Hubei ; Rainfall simulation ; Soil erosion ; Soil properties ; Subtropical zone ; Water erosion
  • This study was designed to reveal the effects of aggregate breakdown mechanisms on interrill erosion dynamics and develop an improved model for assessing interrill soil loss, which incorporated the soil aggregate stability tests as a substitute
  • for the interrill erodibility parameter, from both disturbed and undisturbed samples for red soils in subtropical China. Six cultivated areas of sloping land with red soils were selected, and topsoil aggregate stability was analyzed using the Le Bissonnais method
  • extend the validity of soil aggregation characterization as an appropriate indicator of soil susceptibility to interrill erosion in red soils from subtropical China.
  • 2010
  • Measuring and modelling the actual energy involved in aggregate breakdown
  • Aggregate ; Australia ; Erodibility ; Geophysics ; Model ; New South Wales ; Soil ; Soil erosion ; Soil properties
  • This paper further develops the concept of establishing an aggregate hierarchy by recognising that aggregate breakdown may result in the redistribution of smaller particles throughout any arbitrarily-selected set of soil particle-size intervals
  • and, the dynamics of particle-size redistribution can be described as a function of dispersive energy. To achieve this, soil samples representing Vertisols and Ferrasols are assessed by simultaneously modelling the dynamics of aggregate breakdown in a range of soil
  • particle-sizes (
  • 2010
  • Aggregate ; Agropedology ; Biogenic process ; Carbon ; Plantation ; Soil erosion ; Soil properties ; Spectral signature ; Tropical zone ; Vietnam
  • In this study, the AA. used Near Infrared Reflectance Spectroscopy (NIRS) to quantify the proportion of soil aggregate in eroded soil coming from earthworm activity. This was done by generating NIRS signatures corresponding to different soil surface
  • aggregates (above-ground soil casts produced by earthworms vs. surrounding topsoil). In order to test this approach, they compared the NIRS-signature of eroded soil sediments to those of earthworms' casts and of the surrounding soils. Their results strongly
  • supported that NIRS spectra might be used as “fingerprints” to identify the origin of soil aggregates. Although earthworms are generally assumed to play a favorable role in promoting soil fertility and ecosystem services, this method shows that cast
  • aggregates constitute about 36 and 77% of sediments in two tropical plantations.
  • 2010
  • Patterns in the aggregate stability of Mancos Shale derived soils
  • Aggregate ; Arid area ; Biogenic process ; Colorado ; Duricrust ; Erosion control ; Experiment plot ; Salinity ; Soil erosion ; Soil properties ; United States of America ; Water quality ; Water resources ; Watershed
  • Salt and sediment contributions to the Colorado River and its tributaries pose economic and environmental concerns for the United States and Mexico. Land use decisions promoting the aggregation of Mancos Shale derived soils are one way to reduce
  • the transportation of salts and sediments to water resources. The AA. used a simple field test of soil aggregate stability to determine the site characteristics influencing the soil stability of sedimentary marine shale in the Gunnison Gorge National Conservation
  • 2010
  • Effects of wildfire and laboratory heating on soil aggregate stability of pine forests in Galicia : the role of lithology, soil organic matter content and water repellency
  • Aggregate ; Experimentation ; Forest fire ; Forest soil ; Galicia ; Organic materials ; Permeability ; Soil ; Soil properties ; Spain
  • This work aims to assess the effects of wildfires on soil aggregate stability and the role therein of contrasting lithologies as well as of fire-induced changes in organic matter content and soil water repellency. To this end, a pair-wise comparison
  • of neighbouring burned and unburned soils was carried out and complemented by laboratory heating experiments to clarify the role of fire intensity. The wildfire effects on field aggregate stability were highly variable and results indicated that these changes
  • 2010
  • Aggregating data for the flow-intercepting location model : a geographic information system, optimization, and heuristic framework
  • Aggregation analysis ; Alberta ; Canada ; Flow ; Geographical information system ; Optimization ; Traffic ; Urban transport
  • 2010
  • The article deals with the issue of disparities in regional development. The approach implemented in this study is based on a modified production function, a follow-up evaluation of the quality of business environment and aggregate factors
  • concerning both the utilization of human resources and innovative potential. The indicated methodology was applied to 206 micro-regions in Czechia and calculated values were subsequently aggregated at the level of 14 Czech NUTS 3 regions (kraj). - (EN)
  • 2010
  • Aggregate ; Agropedology ; Andalusia ; Magnetic susceptibility ; Mediterranean area ; Rainfall simulation ; Soil erosion ; Soil properties ; Spain ; Tracer ; Water erosion
  • ) as a soil tracer. Particle size distribution of the magnetic iron oxide, mobility under drainage conditions and the effect of the aggregate size distribution in blank and tagged soils were studied. The use of magnetic iron oxide to estimate soil losses
  • 2010
  • Agroclimatology ; Altitude ; Burgundy ; France ; Interpolation ; Methodology ; Spatial aggregation ; Spatial variation ; Temperature
  • Dans le but d'agréger les données de températures en Bourgogne, les AA. ont utilisé une méthode déterministe : les splines partielles en plaques minces. Afin d'étudier la sensibilité aux échelles de temps de la pertinence de ces estimations, cette
  • 2010
  • Des données micro-économiques agrégées régionalement (plus de 100 000 individus, durée de 6 ans) permettent d'étudier la relation entre la distribution du revenu et du niveau d'instruction, et la croissance économique régionale en Europe occidentale
  • 2010
  • Les AA. étudient les disparités du système d’innovation allemand entre l’Est et l’Ouest en matière de brevets dans le domaine des nanotechnologies. Estimer les effets de la production de connaissance au niveau national suppose d’agréger les données
  • 2010
  • Enquête réalisée en 2002 auprès de personnes âgées résidant à Luxembourg, qui met l'accent sur leur état de santé. La méthode permet d'agréger des informations individuelles pour produire une information discrétisée sur l'espace bâti de la ville
  • 2010
  • Aggregation analysis ; Flow ; Structural stability ; Theory ; Urban geography ; Urban model ; Urban planning ; Urban structure
  • 2010
  • -linéaire sert à simuler un instrument politique prometteur, un système interrégional d'échanges avec des quotas pour la conservation de l'énergie. Méthode statistique pour identifier une classification régionale appropriée de façon à agréger les provinces
  • 2010
  • Cartographic display ; Geostatistics ; Index ; India ; Proximity ; Spatial aggregation ; Spatial analysis ; Spatial autocorrelation ; Spatial structure
  • 2010
  • . Les politiques agrégées de stabilisation sont préférées dans les trois premières régions. La création d'emplois semble être une réaction antérieure à la grande récession (décembre 2000-mars 2002) par rapport à celle de la destruction d'emplois.
  • 2010
  • Aggregation ; Entropy maximization ; Mathematical programming ; Model ; Retail trade ; Spatial economy ; Spatial interaction ; Trip ; Urban model
  • 2010
  • facteurs, agrégés à l'échelle régionale. Sélection de 27 facteurs se rapportant à la société, au milieu naturel, à l'économie et aux services.
  • 2010
  • Le tourisme social agrège des opérateurs associatifs, des comités d’entreprise et des collectivités territoriales qui proposent, parfois selon des modalités d’accès particulières, différentes formes d’hébergement touristique. Ces opérateurs, souvent
  • 2010