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  • 1
    Electronic Resource
    Electronic Resource
    Influence of long-term conservation tillage on soil and rhizosphere microorganisms (1999)
    Springer
    Biology and fertility of soils 29 (1999), S. 81-86 
    Details
    ISSN: 1432-0789
    Keywords: Key words Soil tillage ; Rhizosphere microorganisms ; Cereals ; Nitrogen fixation ; Gaeumanomyces graminis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  In long-term field experiments on sandy loam and loamy sand soils, the influence of conservation and conventional tillage on soil and rhizosphere microorganisms was studied. Conservation tillage stimulated rhizosphere bacteria on winter wheat, winter barley, winter rye and maize in different soil layers. Particularly the populations of Agrobacterium spp. and Pseudomonas spp. were increased. On the sandy loam, N2 fixation and nodulation of pea plants were significantly increased. No influence of different soil tillage was determined on the colonization of the rhizosphere by mycorrhiza and saprophytic fungi. Stubble residues infected with Gaeumanomyces graminis were infectious for a longer time on the soil surface than after incorporation into the soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050528
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    P3 topography in psychiatry and psychopharmacology (1990)
    Springer
    Brain topography 3 (1990), S. 79-84 
    Details
    ISSN: 1573-6792
    Keywords: P300-Mapping ; Schizophrenia ; Major depression ; Physostigmine ; Biperiden
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Endogenous components of event related potentials are of particular interest in psychiatric diseases because of their relations to cognitive and behavioral processes. We studied the topography of these potentials in order to find out whether there are different scalp distributions in schizophrenic and depressive patients in relation to the psychopathological state and compared to normal controls. Furthermore variations of the topographical scalp distribution of P300 in normal volunteers after administration of physostigmine and biperiden was investigated. We demonstrated a clear relationship of the P300 amplitude with the negative symptom axis and found different topographical scalp distributions in different groups and experimental conditions. Topography of event related potentials is therefore a promising field of investigation for a better understanding of psychiatric disorders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01128864
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    Paper (German National Licenses)
    Fulltext
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