Articles by Keyword: Schnute Model

Search results for Schnute Model

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  1. Age and growth of narrow-barred Spanish mackerel <em>Scomberomorus commerson</em> in the coastal waters of southern Mozambique and KwaZulu-Natal, South Africa

    Age and growth of narrow-barred Spanish mackerel <em>Scomberomorus commerson</em> in the coastal waters of southern Mozambique and KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    The narrow-barred Spanish mackerel Scomberomorus commerson is one of the most important linefish species caught in KwaZulu-Natal and southern Mozambique waters, forming the basis of important commercial, artisanal and recreational fisheries. A total of 439 S. commerson were sampled along...
  2. A model for predicting long term economic optimum stocking rates for beef cattle grazing dryland pastures

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Previous models relating profit to stocking rate have not taken into account annual variation in rainfall. A model is developed here to allow for this factor. The frequency distribution of annual rainfall is used to demonstrate how the stocking rate...
  3. Die wiskundige simulering van koolhidraattranslokasie in natuurlike grasveld<sup>1</sup>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Die groeifunksies benodig vir die simulasie van produksie van ‘n Themeda triandra‐grasveld met behulp van die PUTU 11 simulasiemodel is ontwikkel. Vir die ontwikkeling van die model is die veldproduksiedata van die 1980/81 groeiseisoen gebruik waarna dit suksesvol, vir drie...
  4. Simulating browse production and response of <em>Acacia karroo</em> to defoliation I. Model description and sensitivity analyses

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The model is aimed at synthesizing existing data to enhance the understanding of this data and explore the consequences of possible browse management strategies. It gives a good reproduction of the shoot and leaf growth responses used to develop it...
  5. Simulating browse production and response of <em>Acacia karroo</em> to defoliation II. Evaluation of browse management systems and strategies

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    To assess management implications, a model was used to simulate the response of Acacia karroo to a wide range of different climatic patterns and defoliation regimes. The model predicts that if poor growing conditions initiate growth later in spring than...
  6. Plant species dynamics in the Southern Tall Grassveld under grazing, resting and fire

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    An analysis of temporal changes in botanical composition in a long‐term grazing trial indicates that species dynamics in the Southern Tall Grassveld of Natal are determined by the specific combination of grazing, mowing and fire impacts. Species composition of a...
  7. Influence of temperature and daylength on the phenological development of annual <em>Medicago</em> species with particular reference to <em>M. truncatula</em>, cv. Jemalong

    Influence of temperature and daylength on the phenological development of annual <em>Medicago</em> species with particular reference to <em>M. truncatula</em>, cv. Jemalong

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    In a glasshouse and two growth-room trials, carried out in conjunction with 12 serial plantings in pots in the open, it was found that the phenological development of Medicago truncatula, M. tornata, M. aculeata, M. polymorpha, M. scutellata and M...
  8. Soils derived from granite in two Mt. Garnet toposequences, North Queensland, Australia

    Soils derived from granite in two Mt. Garnet toposequences, North Queensland, Australia

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Two toposequences derived from granite in the Mt. Garnet area, North Queensland, were examined to determine the detailed soil - landform relationships in order to facilitate subsequent broad-scale mapping of the soil resource. The dominant landsurface feature is gently sloping,...
  9. Risk analysis of wheat production in the central Orange Free State using a growth model

    Risk analysis of wheat production in the central Orange Free State using a growth model

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A wheat crop growth model (Singels, 1983) was refined and used to calculate annual grain yield from weather data for 45 seasons in the Bloemfontein area. Five different levels of profile-available water capacity were used as soil input parameter. Other...
  10. Typifying late-season weather for maize yield prediction

    Typifying late-season weather for maize yield prediction

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Long-term weather data were used to generate typical weather records. By substituting typical weather data for actual late-season weather data it was possible to compute yield predictions using the model CERES-Maize, and compare these with predictions based on full season...