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  • 1
    Electronic Resource
    Electronic Resource
    Anaerobic Incubation of Soil and the Production of Ammonium (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 534-534 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Anaerobic topsoil values (?NH4 ? N) and aerobic topsoil values (? (NH44-NO34-NO2) ? N) were correlated with maize fertilizer experimental data obtained from a small number of trials (twenty sites) carried out in western Tanzania. The air dry topsoils (0-15 cm) used in the incubation tests were ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/214534a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Zinc Deficiency induced by Mercury in Coffea arabica (1958)
    [s.l.] : Nature Publishing Group
    Nature 182 (1958), S. 1607-1608 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The first effects were observed on trees in field trials which had been treated with phenyl mercury acetate, and appeared 4 5 months after the last application of the fungicide. These effects took the form of a severe leaf scorch such as is often associated with the use of phytotoxic materials. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1821607a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ascorbic Acid Content of Some Local Barbados Foods (1949)
    [s.l.] : Nature Publishing Group
    Nature 164 (1949), S. 531-532 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE West Indian diet normally contains a high proportion of starchy ‘roots’ and fruits such as yams, sweet potatoes, eddoes, breadfruit, banana, etc., but very few leafy green and yellow vegetables, and in some islands very little fruit. This means that, for many people, almost the only source ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/164531b0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The preservation unaltered, of mineral nitrogen in tropical soils and soil extracts (1967)
    Springer
    Plant and soil 27 (1967), S. 53-80 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Experiments have been conducted on different methods of storing soils and soil extracts to preserve the mineral-N status unaltered. Neither the addition of chemicals at the rates used nor storage at sub-zero temperatures were found to preserve the mineral-N status of the soils completely unaltered over short periods of time. Furthermore, evidence was found to show that storage at sub-zero temperatures can effect subsequent mineralization of nitrogen during incubation. The mineral-N content of soil extracts prepared with an acidified K2SO4 reagent was not preserved over short periods by the addition of chemicals, by storing the extracts at sub-zero temperatures or by the addition of copper ions to the extracting solution. The mineral-N content of soil extracts prepared with a neutral KCl reagent could be preserved during storage at subzero temperatures but the addition of copper ions to the extracting reagent was not effective. Changes in the mineral-N content of both soils and soil extracts during storage were not consistent and in the soils appeared to be related to biological activity and the concentration of mineral N present. In soil extracts changes appeared to be related to the concentration of mineral-N present and to some other factor(s).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01373978
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    Paper (German National Licenses)
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