A talajok termékenységét gatlo tényezok Magyarorszagon. (Limitingfactors of soil fertility in Hungary)
Among limitingfactors of soil fertility the A. mentions among others the extremely light texture, acidity, salinity-alkalinity, salinity-alkalinity in the deeper soil layers, extremely heavy texture, water-logging, erosion, solid rock near
Delimitación ; Gestión del medio ambiente ; Limite ; Lógica borrosa ; Paisaje
The precise delineation of geographical landscapes at relevant limits of errors is a key procedure from the perspective of landscape planning, development and management. The study covers four environmental factors, for which fuzzy boundaries
On growth problems of mountain birch near its distributional limits in Climatological extremes in the mountains, Physical background, geomorphological and ecological consequences.
Growth problems observed in mountain birch under marginal circumstances in northern Sweden and southern Groenland. Extreme summer temperatures and strong winter winds as stress factors are discussed.
Incorporation as a factor in formation of an urban system
Les archives concernant les créations et ramifications des sociétés à responsabilité limitée permettent de reconstituer les liens techniques et financiers d'un système urbain. Colorado, années 1859-1879. Rôle de Denver.
Suitability of S factor algorithms for soil loss estimation at gently sloped landscapes
The reliability and the estimation technique of the S factorlimit the use of the Universal Soil Loss Equation (USLE) at a regional scale. The accuracy of the S factor principally depends on the digital elevation model (DEM) accuracy
and the precision of algorithms. The AA. selected a rectangular site in northeastern Germany as a case study to explore the effects of algorithm, horizontal resolution and vertical precision of DEM as well as terrain on the S factor. Results and discussion.
Factorslimiting productivity of overgrazed, semi-arid rangelands on the Njemps Flats, Kenya were investigated, conducting fertilization and irrigation experiments. Productivity was evaluated in terms of yield, vegetation quality and soil chemical
fertility, nitrogen in particular. Water shortage was the major factor restricting plant growth.
Annexion territoriale ; Collectivité locale ; Découpage administratif ; Etats-Unis ; Frange urbaine ; Géographie de l'Amérique ; Limite administrative ; Mississippi ; Population noire ; Région agricole ; Répartition de la population ; Ségrégation
Land markets in the Harris-Todaro model : a new factor equilibrating rural-urban migration
Land rent escalation, which tends to limit rural-urban migration, provides an important additional force that may help determine city sizes in developing countries. The paper provides an alternative to this analysis by assuming that urban residents
Total factor productivity in the contiguous United States, 1977-1986
Economic efficiency ; Factor of production ; Innovation ; Input-output model ; Linear programming ; Measurement ; Production technique ; Productivity ; Regional economy ; United States of America
l'efficacité technique pure, et changements dans les économies d'échelle. Décomposition qui sert à identifier les Etats innovateurs qui repoussent les limites de la production par opposition aux autres.
and anthropogenic factors in order to select sites appropriate to the study of climatic treeline dynamics. Moreover, the AA. want to check whether or not human disturbance has a different impact on treeline altitude in the study sites.
Bathymetric mapping by means of remote sensing : methods, accuracy and limitations
, this method is limited by the coarse bathymetric sampling interval and high cost. The imaging method can be implemented either analytically or empirically, or by a combination of both. Both implementations can produce fine-detailed bathymetric maps over
extensive turbid coastal and inland lake waters quickly, even though concurrent depth samples are essential. The detectable depth is usually limited to 20 m. The accuracy of the retrieved bathymetry varies with water depth, with the accuracy substantially
lower at a depth beyond 12 m. Other influential factors include water turbidity and bottom materials, as well as image properties.
Community attitude as a limitingfactor in port growth: the case of Rotterdam in Cityport industrialization and regional development: spatial analysis and planning strategies.
Etats-Unis ; Généralités sur la géographie ; Limite géographique ; Principe de délimitation ; Régionalisation ; Type de limite
geographers are examining them through the prism of new concepts and methods. 5 Articles: 1. Geographical boundaries: contradictions and paradoxes, 2. Basic types of geographical boundaries, 3. Geographical boundaries as a factor in region-formation, 4
Phosphorus limitation of winter/spring phytoplankton blooms within the Gironde plume in the bay of Biscay
Atlantic Ocean ; Bay of Biscay ; Bloom ; Limitingfactor ; North Atlantic ; Phosphorus ; Phytoplankton ; Population dynamics ; Primary productivity ; Seasonal variation ; Turnover
Bloom ; Dynamique population ; Facteur limitant ; Golfe de Gascogne ; Océan Atlantique ; Océan Atlantique Nord ; Phosphore ; Phytoplancton ; Productivité primaire ; Turnover ; Variation saisonnière
Bloom ; Dinámica población ; Factor limitante ; Fitoplancton ; Fósforo ; Golfo de Vizcaya ; Océano Atlántico ; Océano Atlántico Norte ; Productividad primaria ; Turnover ; Variación estacional
Cette étude est centrée sur l'évolution saisonnière de la production phytoplanctonique des eaux du panache de la Gironde dans le golfe de Gascogne et sur le rôle du phosphore comme facteur limitant de cette production primaire. Les résultats des
mélange. Au printemps, le phosphate est resté indétectable et la production primaire est devenue limitée par le phosphore. Cette limitation est suggérée par le recyclage rapide du phosphate (1 à 2 heures), la compétition pour l'assimilation du phosphate à
l'avantage des bactéries et des activités très élevées de la phosphatase alcaline associée au phytoplancton. La conséquence de cette limitation du phytoplancton par le phosphore est la structuration des algues vers la dominance de petites cellules au
The sales of this stock has been promulgated by the Housing Act in 1991. The large differences between municipalities in the percentage of sold social housing are due primarily to economic factors. It has accentuated regional disparities
and will seriously limit the options for housing tenure reform in the future.
An extensive overview of concepts of boundaries is made. Concepts of natural versus artificial boundaries are discussed. The relation between the notions of boundary, limit, and border is provided and the concept of sovereignity analysed
. The investigation of the functions of boundaries are pointed to. A link is made between the concepts of boundary and spatial barriers. The erosion of European boundaries is analysed and the main factors of change in the functions of European boundaries
Gasteromycetes are well adapted to long distance dispersal by the wind and thus occupy the maximal area corresponding to their ecological needs or are only limited by major dispersal barriers (oceanic for example). They thus provide a model
of the factors determining fungal areas that can be extended to groups less suited for such studies. Examples of distribution maps are presented on a regional (Belgium and Corsica) and continental scale (Europe and North America).