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Showing 81-100 of 1,882 results
  1. Eutrophisation du Léman indiquée par les communautés d'oligochètes: campagnes 1982–1985

    Oligochaete communities (tubificid and lumbriculid worms) were studied between 1982 and 1985 in 23 areas of the mesoeutrophic Lake Geneva...

    Par Claude Lang in Swiss journal of hydrology
    Article 01 September 1986
  2. Migration de la truite lacustre (Salmo trutta lacustris L.) dans le Léman et ses affluents

    A total of 2588 adult migratory brown trout ( Salmo trutta lacustris ) have been tagged from 1964 to 1974 on their spawning sites, in tributaries of...

    Par Bernard Büttiker, Gilbert Matthey in Swiss journal of hydrology
    Article 01 September 1986
  3. Comparaison au moyen de la lysotypie entre souches d'Aeromonas de pisciculture et souches isolées de l'homme

    The spreading of bacteria of the genus Aeromonas in intensive fish rearing tanks was analyzed during one year. Lysoty** has established...

    Par Raffaele Peduzzi, Antonella Demarta in Swiss journal of hydrology
    Article 01 September 1986
  4. Résultats préliminaires d'études sur des méthodes de détermination de l'âge individuel par l'histologie chez quelques Téléostéens

    The study discusses the potential of various histological methods for enhancing the readability of the lines of arrested growth (LAC, annuli) in...

    Par C. Grieder-Kuhn, Ch. Ruhlé in Swiss journal of hydrology
    Article 01 September 1986
  5. Action des radiations de lumière rouge sur la survie et la tubérisation de germes de pomme de terre cultivés ‘in vitro’: influence de leur âge physiologique

    Short spells (5 min) of red light applied to etiolated potato sprouts after excision (0 time) caused opposite effects on rate of tuberisation after...

    A. Blanc, J. C. Mery, J. Boisard in Potato Research
    Article 01 September 1986
  6. Utilisation des engrais chimiques sous conditions tropicales. 2. Effet de l'application d'azote, phosphore et potasse sur la relation entre la radiation interceptée et le rendement de la pomme de terre en Afrique centrale

    In several trials on the role of chemical fertilizers, closure of the canopy was examined with a 90 cm×80 cm quadrant and the relation between...

    A. J. Haverkort, C. Rutayisire in Potato Research
    Article 01 September 1986
  7. Utilisation des engrais chemiques sous conditions tropicales. 1. Effet de l'application d'azote, phosphore et potasse sur les rendements de la pomme de terre en Afrique centrale

    Over 120 000 ha of potatoes are grown every year in the region stretching from Zaire to the Nile: Burundi, Uganda, Rwanda and Zaire. The yield is low...

    A. J. Haverkort, C. Rutayisire in Potato Research
    Article 01 September 1986
  8. Description de trois espèces nouvelles d'Oligochètes aquatiques du Pays Basque (Espagne)

    Three new species of aquatic oligochaetes (Annelida, Oligochaeta) collected in Spain are described. Two are Enchytraeids ( Henlea andreae n.sp. and Ench...

    P. Rodriguez, N. Giani in Hydrobiologia
    Article 01 August 1986
  9. Un copepode nouveau d'Indonesie

    A new species of Cyclopidae (Crustacea, Copepoda) is described from Indonesia. Its morphological features require the creation of a new subgenus in...

    B. H. Dussart, A. Sarnita in Hydrobiologia
    Article 01 August 1986
  10. Effet des variables abiotiques sur la biomasse animale de sept mares temporaires d'eau douce du Québec méridional

    The aim of this study was to ascertain the influence of environmental variables on the seasonal variations of total animal biomass in temporary...

    Antoine Aubin, André Leblanc in Hydrobiologia
    Article 01 August 1986
  11. Transformation chimique d'analogues du propyzamide sur supports solides: Argiles et complexes argilo-humiques

    The catalytic effect of synthetic argilo-humic complexes on chemical transformation of propyzamide and analogs is shown. This chemical transformation...

    J. M. Cantier, J. Bastide in Plant and Soil
    Article 01 June 1986
  12. Etudein vitro de la reprise de la respiration racinaire chez la Moutarde et le Colza après une période de sécheresse

    Root respiration of white mustard ( Sinapis alba L.) and rape plants ( Brassica napus L. var. oleifera M.), dehydrated or watered during growth, was...

    Nicole Vartanian, Michéle Chauveau in Plant and Soil
    Article 01 June 1986
  13. Etude de la réceptivité de quelques sols forestiers de Bourgogne aux maladies produites parPythium ssp. agent de fonte de semis et de nécrose racinaire

    A standard bioassay method was used to measure soil infectivity and estimate the receptivity of ten forest soils collected in Burgundy, to disease...

    R. Perrin in Plant and Soil
    Article 01 June 1986
  14. La résistance des sols forestiers aux maladies provoquées parPythium spp.: Relation avec les conditions stationnelles et déterminisme

    Soil suppressiveness to Pythium disease is estimated with the help of a method based on a standard biossay. Suppressiveness, not very rare in forest,...

    R. Perrin in Plant and Soil
    Article 01 June 1986
  15. Fixation de l'azote atmosphérique et assimilation du nitrate chez le fenugrec (Trigonella foenum graecum L.) cultivé au champ

    The nitrogenase activity ( in situ acetylene reduction) and in vivo nitrate reductase activity were investigated in field-grown fenugreek ( Trigonella...

    N. Desperrier, J. C. Baccou, Y. Sauvaire in Plant and Soil
    Article 01 June 1986
  16. Modifications faunistiques engendrées par une faible variation de débit dans une grande rivière

    Artificial substrates suspended in the water column and benthic dredging were employed to study the drift of macrofauna and the macrobenthic...

    B. Cellot, M. Bournaud in Hydrobiologia
    Article 01 April 1986
  17. Étude comparée des capacités infectieuses des différentes espèces ou variétés deFusarium responsables de la pourriture sèche des tubercules de pomme de terre

    The objective of this study is to confirm the infective potential of 5 species or varieties of Fusarium causing dry rot in potato tubers ( F. roseum ...

    B. Tivoli, K. Abdul Razzaq, ... E. Lemarchand in Potato Research
    Article 01 March 1986
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