Dynamique de versant ; Erosion des sols ; Géomorphologie ; Géométrie hydraulique ; Géosystème ; Relief ; Théorie ; Topographie
This article examines the question of geomorphic self-organization in the context of broad-scale, long-term landscape evolution. Geomorphic perspectives on self-organization are first briefly reviewed. Then, the necessary and sufficient conditions
for a self-organizing geomorphic system are outlined. Examples are examined. Finally, two broad classes of landscape evolution, the cases of increasing and decreasing relief, are shown to differ fundamentally with respect to self-organization.
This short paper is based in part on the information available on the actual functioning and composition of the soil community. The soil biota activity, which utilizes the organic matter for biosynthesis and maintenance at different levels
of organization, has a considerable effect on arid regions. This activity is stongly affected by abiotic factors which are highly unstable especially in a desert ecosystem.
Traditional planning of organic settlements in Ghana
Ghana ; Géographie de l'Afrique ; Habitat rural ; Peuplement ; Répartition ; Société traditionnelle ; Système de peuplement ; Tribu ; Utilisation du sol ; Village
Communication de masse ; Donnée ; Géographie de l'Europe ; Radiodiffusion ; Télévision ; Yougoslavie
Broadcasting organizations and their network in 1983 (with the number of employed persons), radio and television sets, radio and television programmes, international cooperation and broadcasting organizations.
Erodibility of soil and organic matter : independence of organic matter resistance to interrill erosion
Allemagne ; Devon ; Eifel ; England ; Erodabilité ; Erosion des sols ; Etude comparée ; Matière organique ; Modèle ; Propriétés du sol ; Royaume-Uni ; Ruissellement ; Simulation de pluie ; Sol
Comparative study ; Devon ; Eifel ; England ; Erodibility ; Germany ; Model ; Organic materials ; Rainfall simulation ; Rill wash ; Soil ; Soil erosion ; Soil properties ; United Kingdom
In this paper, initial results from a series of interrill erosion experiments conducted on the enrichment of organic matter are reported. Two intensely farmed silts from Devon, UK, and the Eifel region, Germany, were subjected to artificial rainfall
. The texture of the two soils is almost identical, while organic matter content and aggregate stability, and thus aggregate breakdown and interrill erosion differ significantly. The design of the rainfall simulation experiments aimed at measuring organic matter
Nongovernmental organizations and tropical agroecological development, with Honduran examples
Agriculture ; Développement ; Honduras ; Organisation non gouvernementale ; Pratique culturale ; Récolte ; Système de culture
Agricultural practice ; Agriculture ; Crop ; Development ; Farming system ; Honduras ; Non-governmental organization
Using case studies from Honduras, the A. shows how nongovernmental organizations have had an impact in fostering more sustainable crop production among small poor farmers in tropical countries. - (DWG)
Development, unders development, and national spatial organization
Amérique latine ; Croissance économique ; Développement ; Economie ; Espace économique ; Organisation de l'espace ; Sous-développement
Development ; Economic growth ; Economic space ; Economy ; Latin America ; Spatial organization ; Underdevelopment
Survey of the growth of interest in development issues and national spatial organization among Latin Americanist geographers. In the U.S., these themes have curiously elicited little interest.―(DWG)
Seasonal changes in iron transport and nature of dissolved organic matter in a humic river in northern Finland
Cours d'eau ; Fer ; Finlande ; Géochimie ; Hydrologie ; Matière organique ; Qualité de l'eau ; Variation saisonnière
Finland ; Geochemistry ; Hydrology ; Iron ; Organic materials ; Seasonal variation ; Streams ; Water quality
Changes in the concentration of iron and dissolved organic matter (DOM), and in the colour and fluorescence properties in the River Küminkijoki were investigated as functions of the seasonal flow regime over a two-year period. Discussion
Improving aggregate stability of sodic sandy loam soils by organics
Agropédologie ; Agrégat ; Géographie physique ; Propriété du sol ; Sol ; Sol sableux ; Technique de recherche
The objective of this study was to examine at different application rates the effectiveness of some natural and synthetic organics in improving aggregate stability of sodic soils. An attempt has also been made by multi-index approach to select
the most appropriate rate of application and the most suitable organic in the respective groups.
Untersuchungen zur Differenzierung der organischen Substanz in erosionsbeeinflussten Moränenboden. (Investigations into the differences in organic matter of moraine soils influenced by erosion)
Agropédologie ; Erosion des sols ; Fertilité du sol ; Géographie physique ; Matière organique ; Pédologie ; Sol morainique ; Variation spatiale ; Versant
Soil organic matter content and its plant-availability were investigated and the possibilities of spatial distribution of the sampling places tested to record on organic matter differentiation on slopes that are influenced by erosion.
Andes ; Appalachian Mountains ; Communauté rurale ; Himalaya ; Monde ; Montagne ; Organisation internationale ; Protection de l'environnement
Andes ; Appalachian Mountains ; Environmental conservation ; Himalaya ; International organization ; Mountain ; Rural community ; World
Discussion of the philosophy, goals, work, and future plans of The Mountain Institute (TMI), founded in 1973 and still the only international organization dedicated exclusively to environmental conservation and economic development in mountain
communities worldwide. TMI works with local mountain organizations on 3 continents and a global network of people and organizations called the Mountain Forum. - (SLD)
Organizing time in geography : explanations and activities for teachers
Enseignement de la géographie ; Espace-temps ; Géographie du temps ; Pédagogie ; Temps
Outlines the strengths and weaknesses of different ways that geographers organize time : temporal cross-sections; synchronic cross-sections; diachronic subsections; temporal integration. - (DWG)
A területi szervezet természettorténeti koncepcioja. (Natural historical concept of spatial organization)
Aménagement régional ; Concept ; Généralités sur la géographie ; Organisation de l'espace ; Structure spatiale
The difference between the concepts of regional allocation (the management of existing structures) and of spatial organization (a recent term for the objective outcome of historical development). Other terms are also clarified. (DLO).
Organische Spurenstoffe im Rheinwasser. in Arbeitstagung 1981 der Internationale Arbeitsgemeinschaft der Wasserwerke im Rheineinzugsgebiet (IAWR).. (Organic trace materials in the water of the River Rhine)
Cours d'eau ; Eau ; Europe ; Géographie de l'Europe ; Micro-organisme ; Pollution ; Qualité de l'eau ; Rhin, fleuve
In this lecture detailed attention has been paid to the occurrence of organic matter in the Rhine. Several kinds of organic matter have been distinguished. Organic micropollution is described. (H. Winteraeken).
The AA. present the development and characteristics of organic olive production in Slovenia. In 2012, there were 184.5 ha of organic olive orchards, about 10% of all olive orchards. In the future, it is expected that the area of organic olive
orchards could increase to 350 ha. It can be resume from the research that farmers pay too little attention to sustainable agricultural practices, which raises critical reflections regarding the fulfillment of the essential standards of organic farming
Analysis of 41 samples from 11 provinces provides a picture of the geochemical characteristics of the basic organic components of chloroform extract A. Infra red spectra and gas chromatography analysis indicates that the peat is unmature organic
matter and differs completely from ooze in lake or sea bottom. Vegetation species, bog type, evolution stage and sedimentary environment also affect the organic geochemical characteristics.-(TNC)
Organic matter in tropical soils: current conditions, concerns and prospects for conservation
Agroforesterie ; Déboisement ; Erosion des sols ; Forêt ; Matière organique ; Savane ; Sol ; Utilisation du sol ; Zone intertropicale
Agroforestry ; Deforestation ; Forest ; Land use ; Organic materials ; Savanna ; Soil ; Soil erosion ; Tropical zone
This article reviews the current status of organic matter in tropical soils beneath forest and savanna vegetation types and the contribution made to atmospheric carbon dioxide concentrations from decomposition processes in the soil and as a result
of tropical forest clearance. The second aim is to examine the role of soil organic matter in stabilizing soil structure, in nutrient cycling and in ion retention in tropical soils and to assess the effects of forest clearance and subsequent cultivation
on organic matter processes. The final aim is to evaluate possible practices for conserving soil organic matter and maximizing sustainability in tropical cultivation systems after deforestation.