Articles by Author: Melindie Pretorius

Search results for Melindie Pretorius

We found 123 results for you
  1. Determining suitable pedagogical approaches to the application of <em>voce chiusa</em> and the zygomatic arch

    Determining suitable pedagogical approaches to the application of <em>voce chiusa</em> and the zygomatic arch

    Item type: Journal Article • Journal: Journal of the Musical Arts in Africa
    The purpose of this pilot action research study was to document the process of choosing a suitable pedagogical approach that best fits a participant. Three pedagogical approaches as described by Ware were chosen: mechanistic, holistic and eclectic (a combination of...
  2. Invloed van frekwensie en intensiteit van ontblaring op produksie en morfologiese ontwikkeling van <em>pan1cum maximum</em> Jacq. cv. Sabi*

    Invloed van frekwensie en intensiteit van ontblaring op produksie en morfologiese ontwikkeling van <em>pan1cum maximum</em> Jacq. cv. Sabi*

    Strawwe ontblaring (2cm hoogte) teen ‘n twee‐weeklikse frekwensie is uiters nadelig vir loof en wortel DM‐produksie. Hoë intensiteit van ontblaring blyk meer nadelig te wees as hoe frekwensie. Vier‐ tot ses‐weeklikse ontblaring tot op ‘n hoogte van 16 cm het...
  3. The development of a leaf tensilmeter for <em>in situ</em> measurement of leaf tensile strength

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The development of a portable leaf tensilmeter for the in situ measurement of leaf tensile strength is described. Tensile strength is determined by the distortion of strain gauges on modified stripping pliers which are used to break leaf blades. The...
  4. Die invloed van planttyd en plantdigtheid op die duurte en tempo van graanvul van mielies (<em>Zea mays</em> L.)

    Die invloed van planttyd en plantdigtheid op die duurte en tempo van graanvul van mielies (<em>Zea mays</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die invloed van planttyd en plantdigtheid op die lengte van die graanvulperiode en die graanvultempo van mielies is in veldproewe ondersoek. Plantdigtheid het die periode en tempo van graanvul nie betekenisvol beïnvloed nie. Die graanvulperiode het betekenisvol toegeneem terwyl die...
  5. Ammonia volatilization and denitrification losses from commercial fertilizers applied to soil samples

    Ammonia volatilization and denitrification losses from commercial fertilizers applied to soil samples

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Nitrogen losses from nine nitrogen fertilizers, applied to four different topsoil samples, were compared in the laboratory. Total N losses were determined 28 days after application, as a difference between the extractable soil nitrogen initially and after 28 days. The...
  6. 'n Vergelyking van verskillende metodes vir die ekstraksie en bepaling van aluminium in grond

    'n Vergelyking van verskillende metodes vir die ekstraksie en bepaling van aluminium in grond

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Vier metodes vir die ekstrahering en bepaling van Al in suur gronde is vergelyk vir grondmonsters vanaf 'n verskeidenheid van bronne en met pH (KCl) waardes tussen 3,3 en 4,4. Die oogmerk was om 'n vinnige, eenvoudige, maar steeds betroubare...
  7. A comparison of the utilization of initially-applied labelled ammonium and nitrate nitrogen by wheat grown in a pot experiment

    A comparison of the utilization of initially-applied labelled ammonium and nitrate nitrogen by wheat grown in a pot experiment

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The utilization of initially-applied 15N-labelled ammonium and nitrate nitrogen by wheat plants grown in soil was investigated in a pot experiment under controlled growth chamber conditions. The application rate was approximately 140 kg N ha−1) and the treatments consisted of...
  8. Utilization of initially-applied labelled ammonium nitrate by three successive crops

    Utilization of initially-applied labelled ammonium nitrate by three successive crops

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The aim of the study was to compare N uptake from initially-applied NH4 + and NO3- ions and to compile a balance sheet for applied fertilizer N. In a pot experiment, maize, sorghum and sunflower plants were grown in succession,...
  9. An automated colorimetric method for the determination of dicyandiamide in 1.0 M KCI soil extracts

    An automated colorimetric method for the determination of dicyandiamide in 1.0 M KCI soil extracts

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The nitrification inhibitor dicyandiamide (cyanoguanidine, didin or DCD) reacts with 1-naphthol and diacetyl to form a red complex which measures spectrophotometrically at 540 nm. An automated analytical procedure was developed to determine DCD in soils extracted with 1.0 M KCI...
  10. Absence of the 1BL/1RS chromosome translocation in the Kavkaz-derived wheat cultivar Tugela

    Absence of the 1BL/1RS chromosome translocation in the Kavkaz-derived wheat cultivar Tugela

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The South African bread wheat (Triticum aestivumL) cultivar Tugela (Kavkaz/Jaral'S') is highly resistant to stem rust caused by Puccinia graminis Pers. f. sp. tritici Eriks. & Henn. Based on pedigree analysis and infection types, it has previously been assumed that...