Articles by Author: Marie Smith

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  1. A field evaluation of the differential tolerance to soil acidity of forty-eight South African maize cultivars

    A field evaluation of the differential tolerance to soil acidity of forty-eight South African maize cultivars

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A field experiment was conducted on a Normandien clay loam (Plinthic Paleudult) to compare the acid tolerance of 48 commercially grown maize (Zea mays L.) cultivars. Cultivars were compared in terms of grain yield, plant height and leaf Al content...
  2. Application of Partial Least Squares regression to relate tastiness of boiled potatoes to chemical and physical tests

    Application of Partial Least Squares regression to relate tastiness of boiled potatoes to chemical and physical tests

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Partial Least Squares regression (PLS) was used to understand the relationship between 15 sensory attributes of potatoes boiled in their skins as dependent variables (Y), and six objective (chemical and physical) measurements as the independent variables (X). The ARC-Sensory Analysis...
  3. The Effect of Afforestation of Indigenous Scrub Forest with <em>Eucalyptus</em> on Streamflow from a Small Catchment in the Transvaal, South Africa

    Item type: Journal Article • Journal: South African Forestry Journal
    A small catchment under indigenous scrub forest on the Westfalia Estate near Tzaneen in the northern Transvaal was treated by first cutting the riverine (riparian) vegetation and subsequently clearing the remainder of the catchment and establishing a Eucalyptus plantation. The...
  4. ‘N Belowende tegniek vir die bepaling van struikbenutting

    ‘N Belowende tegniek vir die bepaling van struikbenutting

    ‘n Moontlike tegniek om die mate van struikbeijutting te bepaal, sonder enige vooraf metings, word uiteengesit. ‘n Hoë korrelasie (r = 0,8563) bestaan tussen lootdeursnit en totale lootmassa (massa van die loot plus blare) van Portulacaria afra. ’n Weidingsproef is...
  5. The evaluation of tropical pasture species in the Transvaal

    The evaluation of tropical pasture species in the Transvaal

    The performance and compatibility of seven tropical legumes grown in association with two grasses were compared over four years at two localities in the Transvaal.
  6. The pattern of the woody species of the nylsvley savanna ecosystem project area

    The pattern of the woody species of the nylsvley savanna ecosystem project area

    A recent survey of the woodyplants in the Naboomspruit area of the Northern Transvaal has bourne out the fact that plants rarely occur at random in an ecosystem. The densities of all the woody species in five localities of Burkea‐Ochna...
  7. Proposed computerized cross‐index system for storage and retrieval of literature references

    Proposed computerized cross‐index system for storage and retrieval of literature references

    Card index systems are normally not very efficient when used for cross‐indexing purposes and information retrieval, useful information frequently being lost because of poor indexing and little or no cross‐referencing. Large card index systems are often compiled by research workers...
  8. The influence of vesicular‐arbuscular mycorrhizas on production and nutrition of white clover

    The influence of vesicular‐arbuscular mycorrhizas on production and nutrition of white clover

    Inoculating white clover seedlings with E3 and Glomus tenuis vesicular‐arbuscular mycorrhizas produced slight increases in dry matter production in unsterilized field plots at Cedara, Natal. Phosphorus levels in plant tops showed no increases due to mycorrhizas but crude protein content...
  9. Die struikweidingswaarde van die oos‐kaap‐valleibosveld

    Die struikweidingswaarde van die oos‐kaap‐valleibosveld

    Die voedingswaarde van die Oos‐Kaap‐Valleibosveld, in terme van ruproteien, verteerbare droëmateriaal, verteerbare energie en metaboliseerbare energie, soos geselekteer deur Boer‐ en Angorabokke wat van slukdermfistels voorsien is, is bepaal. Die resultate toon dat die Valleibosveld ‘n konstante voedingswaarde van ‘n...