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  • 1
    Electronic Resource
    Electronic Resource
    Diagnosis of nitrogen deficiency in barley, growing in different rotation systems, by plant analysis (1986)
    Springer
    Nutrient cycling in agroecosystems 9 (1986), S. 241-250 
    Details
    ISSN: 1573-0867
    Keywords: critical level ; nitrate ; nitrogen fertilizer ; plant analysis ; total nitrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Nitrate concentrations were determined in stems of barley taken at the tillering stage from a 2-year rotational/N fertilizer experiment carried out at 2 locations in Cyprus. In the second year leaf laminae were also analysed for total nitrogen (N) concentration. At sampling maximum dry matter (DM) production was obtained with NO3-N concentration above 1000 mg kg−1, which increased with N fertilizer supply. Even though there were differences in DM and NO3 concentration between rotation treatments the relationship between DM and NO3 was similar. Nitrate in stems was more sensitive than total N in leaf laminae as an indicator of N nutrition status.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01050350
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of wheat and barley varietal differences in nitrate concentration on plant analysis interpretation (1987)
    Springer
    Nutrient cycling in agroecosystems 12 (1987), S. 157-163 
    Details
    ISSN: 1573-0867
    Keywords: barley ; wheat ; nitrate concentration ; plant analysis ; genotypic differences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Wheat and barley varieties from breeding plots in advanced yield trials were tested for NO3 concentration in their stems at the tillering stage. The study was carried out for three years, at three different locations with a high number of varieties, aiming to determine whether there are varietal differences which could affect the interpretation of prognostic standards set up in a previous study. From nine comparisons between 12 different varieties it was shown that differences in NO3 concentration occurred on only three occasions and these were due to factors which affect NO3 in plants, other than genotypic. The study concluded that varietal differences in NO3 concentration are not a critical consideration for the interpretation of prognostic standards for genotypes which have been developed for certain environmental conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01048915
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    Paper (German National Licenses)
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