Articles by Author: Mariette Marais

Search results for Mariette Marais

We found 123 results for you
  1. Plant-Parasitic Nematodes in Forest Soils in the Transvaal and Natal, South Africa

    Item type: Journal Article • Journal: South African Forestry Journal
    During a survey of plant-parasitic nematodes in forest soils between June 1989 and April 1991,164 soil samples were collected from forestry areas in the Transvaal and Natal. Acacia mearnsii plantations, species of Pinus and Eucalyptus, indigenous forests and virgin veld...
  2. Plant Nematodes in the Bergplaas Plantation, Western Cape Province with a Description of a New <em>Criconema</em> Species and Notes on Two Known Species of Criconematidae

    Item type: Journal Article • Journal: South African Forestry Journal
    During a survey of plant-parasitic nematodes in the Bergplaas Plantation, Western Cape Province, one Acacia melanoxylon compartment, seven Pinus compartments and twenty-two pockets of indigenous forest and virgin veld were sampled. Criconema, Rotylenchus and Scutellonema species were found at most...
  3. Plant nematodes in the Lottering Plantation, Eastern Cape Province

    Plant nematodes in the Lottering Plantation, Eastern Cape Province

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    During a survey of plant nematodes in the Lottering Plantation, Eastern Cape Province, thirteen Pinus compartments, six indigenous forest and eight Fynbos areas were sampled. The nematode genera Helicotylenchus and Scutellonema were the most common whereas Criconema, Hemicycliophora, Mesocriconema, Tylenchorhynchus,...
  4. Direct Gamma Ray Densitometry of Wood

    Item type: Journal Article • Journal: South African Forestry Journal
    Wood density was determined in various wood species representing a wide range of densities using 60 KeV collimated soft gamma radiation from an Americium241 energy source. In the samples examined wood mass attenuation coefficients varied from 0,170 to 0,210 cm2g...
  5. Die potensiaal vir droëland aangeplante weiding in die vrystaatstreek

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Die uitbreidingspotensiaal van aangeplante weiding in die Vrystaatstreek is ondersoek. Die potensiaalomskrywing is gedoen aan die hand van klimatologiese oorwegings, beskikbaarheid van grond en die winsgewendheid van aangeplante weiding teen‐oor veld, mielie‐ en koringproduksie.
  6. An evaluation of the economic viability of commercial pastoralism in the <em>smaldeel</em> area of the Eastern Cape

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Carrying capacity models and financial data from study group farmers were used to derive attainable net revenue per ha on veld in good, moderate and poor condition. From these data, minimum farm sizes required for a reasonable standard of living...
  7. Effect of wilting on biochemical and microbiological changes in Kikuyu <em>(Pennisetum clandestinum</em> Hochst) silage

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Small‐scale laboratory silos were used to study the fermentation process of Kikuyu (Pennisetum clandestinum Hochst) silage prepared from grass containing 25% and 40% dry matter. Silage made from grass containing 40% dry matter was found to be better preserved and...
  8. The effect of nitrogen fertilization on the quality of Kikuyu silage

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Small‐scale laboratory silos were used to study the fermentation process of Kikuyu (Pennisetum clandestinum Hochst) silage prepared from grass grown at three nitrogen fertilizer levels (300, 400 and 500 kg N/ha/year). Kikuyu grass was cut at three and six‐week growth...
  9. Effect of nitrogen on the oxalate and calcium content of Kikuyu grass (<em>Pennisetum clandestinum</em> Hochst)

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The effect of the nitrogen content of Kikuyu grass (Pennisetum clandestinum) on the oxalate and calcium content of leaf and stem material was investigated. The grass contained equal portions of soluble and insoluble oxalate. Leaf material contained more than three...