Stone and gravel contents of arable soils influence estimates of C and N stocks
to an overestimation of C and N stocks by 8-9%. It was concluded that the inclusion of stone and gravel volume of arable soils may be important if nutrient stocks of different sites are compared, or the effects of land use changes are scaled up to regional or global
Analyzing the impact of public capital stock using the NEG wage equation : a spatial panel data approach
équations simultanées qui correspond à l'équilibre de court terme de la théorie de la nouvelle géographie économique. La productivité est sous une dépendance directe de la dotation en stocks de capitaux publics de chaque province.
In this study, the SPEROS-C model was modified to analyse erosion induced lateral and vertical soil C fluxes and their effects upon soil organic carbon (SOC) stocks in a small agricultural catchment. The model was applied for the period between 1950
and 2007 covering 30 years of conventional tillage (1950-1979) followed by 28 years of conservation tillage (1980-2007). In general, modelled and measured SOC stocks are in good agreement for 3 observed soil layers. Land management has a significant impact
To reduce uncertainties from upscaling spatial processes of the DeNitrification-DeComposition (DNDC) model for improving the definition of China's paddy soils SOC stocks (0-30 cm) and their changes from 1980 to 2008, a soil polygon-based modeling
. Increases in paddy soil SOC stocks were found predominantly in South, Eastern and Southwest China. Enhancement in the soil databases with higher resolution inputs should improve the C sequestration estimates of any area of interest.
Soil organic carbon (SOC) contents were examined beneath two grassland vegetation communities and cold desert sites in permafrost areas of the central western part of the Qinghai-Tibet Plateau. More than 80 per cent of SOC stocks beneath
the grasslands were in the top 100 cm. Correlation analyses showed that SOC stocks in the top 150 cm are linked to soil moisture content, and the vertical distribution of SOC is mainly affected by depth and soil moisture content. Moisture content and vegetation
latitude, vegetation affected SOC stock and the dynamics of its labile fractions. Therefore, wetlands in mid-high latitudes contain a large carbon pool, and carbon stock varies with latitude. Although the labile fractions were higher in the permafrost
caractérisent les stocks régionaux de connaissance, dont des indicateurs de fractures technologiques régionales refétant la distance à une frontière technologique. La manière d'accomoder dépendance spatiale et hétérogénéité s'avère primordiale.
The AA. estimate a model of urban productivity in which the agglomeration effect of density is enhanced by a metropolitan area's stock of human capital. Using new information on output per worker for U.S. metropolitan areas along with a measure
Enregistrements et effets du climat sur les stocks d'eau (fleuve, rivière / nappe souterraine / mer) à l'échelle globale, nationale (France) et régional (bassin de la Seine)
International climate negotiations have stressed the importance of considering emissions from forest degradation under the planned REDD+ (Reducing Emissions from Deforestation and forest Degradation + enhancing forest carbon stocks) mechanism
emissions of carbon and other GHG from mosaic landscapes with forest degradation since most research has focused on binary analyses of forest vs. deforested land. Recent technological advances in remote sensing have improved estimation of carbon stock
between protecting and utilizing land is difficult. In this area, as a result of exploitation, agriculture on fertile peat is succeeded by stock raising on infertile peat, peat extraction, inundation, and drainage to regain fertile soil; (2) In the dynamic
stock de migrants est sensiblement moindre que celui qui est attendu, ce qui livre une mesure plus plausible de la migration induite par les réseaux. Les sortants originaires de régions dites centrales sont en déclin plus prononcé en fonction de la
des acteurs, comme la Chine. Les métaux rares sont devenus des enjeux politiques et stratégiques. On dénonce de plus en plus les impacts environnementaux de ces exploitations. Les ressources minières correspondent à un stock limité dans le sous-sol
of land-cover change on the C stock from 1972 to 2008 in a natural reserve (Grotta di Santa Ninfa) in western Sicily. They selected 15 paired sites representative of 5 LUCs. The results indicate that land-use conversion, vegetation type, and management
Income ; Latvia ; Local amenities ; Middle class ; Residential choice ; Riga ; Social geography ; Stock of real estate ; Suburbanization ; Urban migration ; Urbanization
Detached house ; Estonia ; Housing ; Land reform ; Large city ; Metropolitan area ; Owner-occupier ; Residential choice ; Social class ; Stock of real estate ; Suburbanization ; Tallinn