Articles by Author: Mr Greeff Laubscher

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We found 37 results for you
  1. The occurrence of mycotoxigenic fungi in abalone feed in South Africa

    The occurrence of mycotoxigenic fungi in abalone feed in South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Abalone feed in South Africa is mainly produced from locally sourced grains and has soy or fishmeal as a protein source. Contamination with fungal species associated with grain-based animal feed is, therefore, a predictable risk. Various Fusarium, Penicillium and Aspergillus...
  2. Standardization of an experimental micro bread-baking technique for evaluation of wheat cultivars

    Standardization of an experimental micro bread-baking technique for evaluation of wheat cultivars

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    An experimental micro bread-baking technique using 10 g of wheat flour was employed to determine the levels of various ingredients to obtain optimum loaf volumes. Flour samples were mixed with different ingredients and allowed to ferment in a fermentation cabinet...
  3. Effect of time and rate of nitrogen application on the malting quality of barley

    Effect of time and rate of nitrogen application on the malting quality of barley

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Field trials were conducted to determine the effect of time and rate of single and split applications of nitrogen on various malting parameters of barley. The effect of a single low nitrogen application of 50 kg Nha−1 at sowing was...
  4. The effect of date of planting on the fibre properties of four cotton cultivars grown under irrigation

    The effect of date of planting on the fibre properties of four cotton cultivars grown under irrigation

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effects of date of planting on the fibre properties of four cotton cultivars, Acala 1517–70, Albar 70C, Deltapine 5826 and Albacala CS-2, were investigated under irrigated conditions over a 3-year period near Groblersdal. Six dates of planting at fortnightly...
  5. Economical manual estimation of ammonium, nitrate and total inorganic nitrogen in soils

    Economical manual estimation of ammonium, nitrate and total inorganic nitrogen in soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Colorimetrie methods for measurement of ammonium, nitrite and nitrate were modified (a) for application to small samples of nitrogen-poor soils, (b) by centrifugation of extracts to avoid contamination from filter papers and (c) to economize on apparatus and reagents. Estimates...
  6. Barley cultivar identification by acid Polyacrylamide gel electrophoresis of hordein proteins

    Barley cultivar identification by acid Polyacrylamide gel electrophoresis of hordein proteins

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Methods are described for the extraction and separation of hordein proteins of barley by acid Polyacrylamide gel electrophoresis as a means of identifying different cultivars. Experimental conditions for the extraction of the proteins from single kernels and from corresponding flour...
  7. Kinetika van nitrifikasie in gronde van die sentrale besproeiingsgebiede in Suid-Afrika

    Kinetika van nitrifikasie in gronde van die sentrale besproeiingsgebiede in Suid-Afrika

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die verloop van nitrifikasie is in agt gronde, afkomstig van die sentrale besproeiingsgebiede, gemonitor na toediening van (NH4)2SO4 teen die ekwivalent van 100 kg N ha−1 aan beide die bo- en ondergronde. Tydens inkubasie by 30°C is die NH4 +,...
  8. Die verwantskap tussen maksimum nitrifikasietempo en relevante eienskappe van gronde vanaf die sentrale besproeiingsgebiede in Suid-Afrika

    Die verwantskap tussen maksimum nitrifikasietempo en relevante eienskappe van gronde vanaf die sentrale besproeiingsgebiede in Suid-Afrika

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die oogmerk van die studie was om die verwantskappe tussen maksimum nitrifikasietempo (Kmaks) en relevante eienskappe van die gronde vanaf die sentrale besproeiingsgebiede uit te wys. Die verloop van nitrifikasie is in agt gronde, afkomstig van die gebiede, gemonitor na...
  9. Use of the SDSS test to predict the protein content and bread volume of wheat cultivars

    Use of the SDSS test to predict the protein content and bread volume of wheat cultivars

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The relationship between the sodium dodecyl sulphate sedimentation volume (SDSS test) and the protein content and bread volume of wheat cultivars was determined to ascertain whether the SDSS test could be used to predict these parameters of baking quality. This...
  10. An explanation of genotype by environment interaction for maize in South Africa

    An explanation of genotype by environment interaction for maize in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The causes of genotype interaction with the environment was investigated using AMMI (Additive Main Effects and Multiplicative Interaction) analysis. AMMI quantified environments by means of E_IPCA1 (first principal component analysis for environment) such that it was highly significantly correlated (r...