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  • Tendances, problèmes et opportunités de la culture et du marché des plantes médicinales et des plantes à épice en Allemagne
  • Allemagne ; Commercialisation ; Epices ; Marché ; Plante cultivée ; Plante médicinale
  • Cultivated plants ; Germany ; Market ; Marketing
  • This article addresses the trends, problems and opportunities attending the cultivation and marketing of medicinal and spice plants in Germany. The years since 1993 have seen an expansion in their cultivation to a current area of some 10,000
  • 1999
  • Physiological significance of low atmospheric CO2 for plant-climate interactions
  • This paper reviews the scope of research addressing the consequences of low atmospheric CO2 for plant and ecosystem processes and highlights why consideration of the physiological effects of low atmospheric CO2 on plant function is recommended
  • 1999
  • Plant closures by multi-locational firms : a comparative perspective
  • Classification ; Decision ; Discriminant analysis ; Economic sector ; Enterprise ; Factory closure ; Plant ; United Kingdom
  • 1999
  • Selective transport of sediment related to rainfall kinetic energy, plant cover-stoniness and clearing
  • Experiment plot ; Grain size distribution ; Huesca ; Plant cover ; Precipitation ; Rill wash ; Roughness ; Semi-arid area ; Soil erosion ; Spain ; Splash ; Vegetation ; Water erosion
  • 1999
  • Impact of climate change on dynamic of plant communities, lakes and swamps in Beijing area during Holocene period
  • Based on pollen analysis, charcoal fragment, C 14 radiocarbon data and loss-on-ignition (LOI), this paper analyses the plant communities in Beijing area during Holocene period. Lakes and swamps changes and plant fictional types have been discussed.
  • 1999
  • Does plant cover structure in rural areas modify climate change effects?
  • Atmospheric circulation ; Climatic variation ; Evapotranspiration ; Global change ; Heat flow ; Land use ; Plant canopy ; Poland ; Rural area
  • This paper shows that : modification of the plant cover in an agricultural landscape influences the vertical flux of sensible heat; the changes in land-use pattern influence the vertical fluxes of sensible and latent heat at the scale
  • 1999
  • Mean July temperatures during the Younger Dryas in nothwestern and central Europe as inferred from climate indicator plant species
  • The aim of this paper is to attempt a quantitative reconstruction of summer temperatures for the Younger Dryas in Europe. The AA. estimated minimum mean July temperatures from distributions of climate indicator plant species, which were
  • reconstructed from 140 pollen and plant macrofossil diagrams. The reconstructed temperatures are comparable with temperature estimates based on beetle data. However, they appear rather high when compared with estimates based on glaciological evidence.
  • 1999
  • Agropédologie ; Belgique ; Bilan d'érosion ; Erosion des sols ; Plante cultivée ; Récolte
  • Agropedology ; Belgium ; Crop ; Cultivated plants ; Erosion budget ; Soil erosion
  • 1999
  • Café ; Forêt ; Milieu naturel ; Plante cultivée ; Plateau ; Savane ; Togo ; Togo du Sud-Ouest
  • Coffee ; Cultivated plants ; Forest ; Natural environment ; Plateau ; Savanna ; Togo
  • 1999
  • Amélioration génétique ; Angiospermae ; Animal ruminant ; Culture tropicale ; Dicotyledones ; Ecophysiologie ; Elevage ; Exploitation herbage ; Fertilité sol ; Fourrage ; Gramineae ; Leguminosae ; Monocotyledones ; Plante fourragère ; Prairie
  • Ecophysiologie des plantes fourragères tropicales. Amélioration génétique des graminées fourragères tropicales. Quelques aspects agronomiques des plantes fourragères. Valeur alimentaire des fourrages cultivés. Choix des plantes fourragères
  • . Production de semences fourragères tropicales. Etablissement et entretien des prairies. Exploitation des cultures fourragères. Plantes fourragères et maintien de la fertilité du sol. Intégration des cultures fourragères dans les systèmes de production.
  • 1999
  • In order to study the airborne pollen and spores, a circular year airborne samples were collected at 10m height above ground from Taoyuan ecological station. The analytical results showed that there are 188 plant families and genera in airborne
  • pollen and spores. There are 2 peak stages of airborne pollen and spore concentration throughout the year. One is the peak stage of xylophyte plants from March to May and the other, herbaceous plants from middle August to early October. The maximum year
  • 1999
  • Towards a world mire plant species list
  • L'A. décrit l'un des programmes internationaux de l'International Mire Conservation Group - IMCG, qui sera discuté à l'occasion du Millenium Event : constitution d' une liste des espèces de plantes des tourbières dans le monde (zones holarctique
  • 1999
  • Erosion of plant genetic resources : causes and effects
  • 1999
  • the coastal sites of the plant. However there are differences between the coastal and inland growing sites : electrolyte content, chemical analyses of the plants. Thus the occurrence in Kuusamo poses several ecological and palaeoecological problems.
  • 1999
  • Petaloid organs preserved in an arctic plant macrofossil assemblage from full-glacial sediments in southeastern Minnesota
  • 1999
  • The first domestications of plants and animals, which occurred between 10 K years and 5 K years BP, and which underpinned the inception of agricultural systems, represent a major turning point in cultural and environmental history. New methods
  • of age estimation, notably by radiocarbon, have necessitated a reappraisal of the origins of agriculture in Mesoamerica, whilst biomolecular techniques are contributing to the identification of the wild relatives of domesticated plants and animals
  • 1999
  • Réponse du blé dur au stress hydrique et à la profondeur de semis pendant le stade jeune plante
  • 1999
  • Agriculture ; Belgique ; Géographie historique ; Histoire rurale ; Plante cultivée ; Production agricole ; Récolte ; Siècle 18 ; Siècle 19 ; Surface cultivée ; Technique agricole ; Terre arable
  • Agricultural production ; Agricultural technique ; Agriculture ; Arable land ; Belgium ; Crop ; Cultivated plants ; Cultivated surface ; Eighteenth Century ; Historical geography ; Nineteenth Century ; Rural history
  • des plantes à rendements plus élevés ont été introduites (pomme de terre et plantes destinées à l'alimentation animale). Un accroissement de la production en est résulté.
  • 1999
  • Bolivie ; Drogue ; Développement régional ; Impact économique ; Lutte contre la toxicomanie ; Plante cultivée ; Produit agricole ; Société rurale ; Stratégie de développement ; Trafic
  • Agricultural product ; Bolivia ; Cultivated plants ; Development strategy ; Drug ; Economic impact ; Regional development ; Rural society ; Traffic
  • 1999
  • Agriculture ; Besoin en eau ; Chine ; Chine du Nord ; Céréale ; Evapotranspiration ; Modèle ; Plante cultivée
  • Agriculture ; Cereal ; China ; Cultivated plants ; Evapotranspiration ; Model ; Northern China ; Water needs
  • 1999