LES EXPLOITATIONS FAMILIALES LES PLUS RENTABLES SONT SOUVENT COMPOSEES DE PARCELLES DISPERSEES. MONOGRAPHIES DE QUELQUES EXPLOITATIONS AU MINNESOTA. LEUR SUCCES POSE LE PROBLEME DU REMEMBREMENT.
Assessment of agricultural land fragmentation in Romania, a case study : Izvoarele commune, Olt county
Agriculture ; Développement régional ; Exploitation agricole ; Olt ; Paysage fragmenté ; Paysage rural ; Roumanie ; Utilisation agricole du sol
Agricultural land use ; Agriculture ; Farm ; Fragmented landscape ; Regional development ; Romania ; Rural landscape
Agricultural land fragmentation is a common phenomenon in developing countries in general and for Romanian agriculture in particular. The aim of this study was to analyze the degree of fragmentation of Romania’s agricultural land, which
is considered a major obstacle in the development of a modern agriculture. The analysis undertaken has shown that the degree of land fragmentation is high in the study area; the most fragmented are the big farms, while the small ones are more compact. - (IKR)
International oil: the risks of a fragmented system
Commerce international ; Dépendance ; Exploitation ; Géographie humaine ; Industrie pétrolière ; Monde ; Pays producteur ; Pétrole ; Ressource
Quel que positif qu'ait été à cet égard l'ancien système international de l'industrie pétrolière, cette fragmentation actuelle est un fait: il trouve d'ailleurs sa justification principale dans les aspirations nationales des pays qui ont voulu
prendre le contrôle des activités pétrolières. Mais il importe toujours d'éviter le gaspillage et de tendre vers une exploitation rationnelle des hydrocarbures à l'échelon régional, sinon mondial. La prise de conscience de ce problème au niveau
Mining soil databases for landscape-scale patterns in the abundance and size distribution of hillslope rock fragments
California ; Cascade Mountains ; Distribution statistique ; Dynamique de versant ; Etats-Unis ; Exploitation minière ; Fragment de roche ; Granulométrie ; Hawaii ; Météorisation ; Propriétés du sol ; Précipitation ; Régolithe ; Sierra Nevada
California ; Grain size distribution ; Hawaii ; Mining activity ; Precipitation ; Regolith ; Rock fragment ; Sierra Nevada ; Slope ; Slope dynamics ; Soil properties ; Statistical distribution ; United States of America ; Washington State
The AA. explored the utility of soil survey databases for data mining, with the goals of identifying landscape-scale patterns in the abundance and size distribution of rock fragments (diameter D>2mm) and potential controls on grain size production
and transport, constructed depth-averaged grain size distributions and calculated the mass fraction of rock fragments and the median rock fragment grain size. They also categorized as bimodal, size distributions with a clear ‘breakpoint’ between fine and coarse
mechanistic hypotheses for rock fragment production on soil-mantled hillslopes.
Définition, mesure extension et causes du morcellement des exploitations agricoles. Conséquences du morcellement sur l'économie rurale et plus particulièrement les limitations qu'il introduit pour la productivité agricole. Améliorations apportées
La prolifération de l'agriculture de loisirs menace l'avenir de l'agriculture commerciale, en fragmentant les exploitations et en faisant monter le prix des terres agricoles.
Does political fragmentation lead to budgetary incrementalism ? An empirical test on the French local public sector
Collectivité territoriale ; Département ; Dépenses publiques ; Finance ; Finances locales ; Fragmentation politique ; France ; Pouvoir politique ; Secteur public ; Service public
Département ; Finance ; France ; Local finance ; Political fragmentation ; Political power ; Public expenditure ; Public sector ; Public service ; Territorial unit
Impact de la fragmentation politique sur la volatilité des dépenses publiques. Deux stratégies différentes sont mises en oeuvre, à partir des dépenses d'exploitation per capita de 90 administrations locales françaises (départements), sur une période
de 8 ans. Dans la première, on met l'accent sur l'impact de la marge électorale, de la fragmentation de la majorité et la concentration de l'opposition sur les taux de croissance du budget annuel. Dans la seconde, on effectue une régression des
Loggers and forest fragmentation : behavioral models of road building in the Amazon basin
Les AA. étudient les caractéristiques émergentes des réseaux routiers, qui sont la cause initiale de la fragmentation des forêts tropicales. Examen des processus de construction de routes de la part des exploitants forestiers. L'approche combine un
Division en régions physiques de ce massif situé dans l'oblast d'Irkutsk. Fragment de la carte des géosystèmes et de leur dégradation par l'action anthropique. Dégradation des géosystèmes par région en pourcentages.
Incipient motion conditions for single rock fragments in simulated rill flow
This paper examines incipient motion conditions for single rock fragments in simulated rill channels : threshold conditions for rock fragments in rill flow will be compared with existing theory (Shields) for channels and rivers.
Road reconstruction and landscape fragmentation in China
The landscape fragmentation caused by road construction has many direct and indirect impacts on wildlife and ecosystems. By using the GIS and statistic software of fragmentation computation, a comprehensive index, road-induced landscape
fragmentation index (RLFI), is proposed to quantify the degree of landscape fragmentation resulting from different levels of road constructions. The anisotropic analysis indicates that the variation of fragmentation index in east-west direction is larger than
Soil containing rock fragments: effects on infiltration
Rock fragments in soil: surface dynamics
Procedures for quantifying soil and surface rock fragments are reviewed. Within the soil the physical properties and hydraulic properties that affect infiltration are shown to be influenced by rock fragments. Physical properties discussed are bulk
density, porosity and water content. Hydraulic properties that affect infiltration are water retention, saturated conductivity and unsaturated conductivity. Rock fragments on the soil surface have been reported to both increase or decrease infiltration
Rock fragments in top soils: significance and processes
Rock fragments in soil: surface dynamics
This introductory paper reviews various aspects of rock fragments in top soils. Such information is required in particular for predicting the impact of climatic or landuse changes on the response of these soils. Particular attention is paid
to the definition and measurement of rock fragment content in top soils, the density of soils containing rock fragments, the spatial distribution and movement of rock fragments in top soils, the effects of rock fragments on some key hydrological processes, thermal
by the fragmented structure and overwhelmingly outdated and therefore non-exploited capacities, and by the fact that the system of laboratory services is highly decentralised. - (AM)
Large estates have long been recognized as the basic unit of exploitation in the early-medieval period. Although many have sought to distance themselves from the multiple estate model (G. Jones), most would still accept that early-medieval England
was everywhere divided into large territories which fragmented in the later pre-Conquest period to form the manorial units recorded by Domesday Book.