Changement global ; Céréale ; Etude d'impact ; Plante cultivée ; Production agricole ; Scénario ; Simulation ; Variation climatique
Agricultural production ; Cereal ; Climatic variation ; Cultivated plants ; Global change ; Impact study ; Scenario ; Simulation
with the static World Policy Simulation modelling framework, to determine the combined direct and indirect temporal impacts of an enhanced greenhouse effect climate scenario.
Agricultural cooperation ; Agricultural policy ; Agriculture ; Environment ; European Union ; France ; Greenhousecultivation ; Rural area ; Rural landscape ; Western France
Carbon storage and greenhouse gases emission from a fluvial reservoir in an agricultural landscape
Bassin-versant ; Dioxyde de carbone ; Eagle Creek ; Erosion des sols ; Erosion hydrique ; Etats-Unis ; Flux ; Hydrochimie ; Indiana ; Lac artificiel ; Méthane ; Sol cultivé ; Transport sédimentaire ; dioxyde d'azote
Carbon dioxide ; Cultivated land ; Flow ; Hydrochemistry ; Indiana ; Methane ; Reservoir ; Sediment transport ; Soil erosion ; United States of America ; Water erosion ; Watershed ; nitrogen dioxide
Carbon ; Carbon sequestration ; China ; Climatic change ; Cultivated land ; Greenhouse effect ; Model ; Rice cultivation ; Soil ; Soil properties ; Space time
Années 1980-2008 ; Carbone ; Changement climatique ; Chine ; Effet de serre ; Espace-temps ; Modèle ; Propriétés du sol ; Riziculture ; Sol ; Sol cultivé ; Séquestration du carbone
Agropédologie ; Amendement du sol ; Chine ; Développement durable ; Irrigation ; Lhasa ; Montagne ; Pratique culturale ; Productivité agricole ; Propriétés du sol ; Sol cultivé ; Tibet
Agricultural practice ; Agricultural productivity ; Agropedology ; China ; Cultivated land ; Irrigation ; Mountain ; Soil improvement ; Soil properties ; Sustainable development ; Tibet
in Lhasa (alluvial soil, steppe soil, and meadow soil). At the same time, another 55 composite samples and core samples were taken from the grain-crop land, open vegetable land and greenhouse vegetable land of the alluvial soil. Selected soil properties
to the application of manure and the intensity of cultivation.
, covering the period between 1945 and 1998. The direction and the timing of change (or the lack of it) was related to rural depopulation, the emergence of greenhousecultivation and tourism growth, and the geology and topography of each site. The underlying
Exposé de conclusions nouvelles sur les conséquences de l'effet de serre (positives et négatives) sur l'activité humaine, la photosynthèse et la productivité des plantes cultivées. On relève des contradictions entre les différentes estimations
Quantification of soil redistribution in cultivated fields using caecium-137, Outlook, Saskatchewan
Canada ; Erosion des sols ; Pratique culturale ; Saskatchewan ; Sol ; Sol cultivé ; Traceur ; Vent
Agricultural practice ; Canada ; Cultivated land;Cultivated soil ; Indicator element ; Saskatchewan ; Soil ; Soil erosion ; Wind
The objective of this study was to quantify the redistribution of soil by wind and cultivation. The artificial fall-out radionuclide caesium-137 was used as a tracer to estimate net soil redistribution. Two sites disturbed by cultivation, one since
at least the 1940s and the other since 1979 were sampled in 1988 to estimate the influence of wind and cultivation practices.
Prospects of improved farming systems in a shifting cultivation area in Zambia
The transition from traditional shifting cultivation to permanent maize cultivation in Northern Zambia wa studied with emphasis on land, labour and agro-economical aspects.
The status and fluxing of alkali and alkaline-earth metals in a savanna alfisol under long-term cultivation
Agropédologie ; Argile minéral ; Dégradation des sols ; Engrais ; Géochimie ; Métaux alcalino-terreux ; Métaux alcalins ; Nigéria ; Savane ; Sol cultivé ; Sol lessivé ; Utilisation agricole du sol
Agricultural land use ; Agropedology ; Clay mineral ; Cultivated land ; Fertilizer ; Geochemistry ; Nigeria ; Savanna ; Soil degradation
This study investigates the impact of soil management on the status and fluxes of alkali and alkaline-earth metals in a savanna alfisol after 50 years of cultivation. The objective is to determine a suitable management practice which can best
protect savanna soils against rapid degradation and potential acidification under long-term cultivation.
Agriculture ; Guinea ; Mathematical model ; Model ; Population growth ; Shifting cultivation ; Simulation
This paper will present a computer model of a certain class of agricultural systems, termed shifting cultivation systems. The objective of modeling is to demonstrate how such decision rules control overall system behaviour, and to study the response