Articles by Keyword: Maturity Classification

Search results for Maturity Classification

We found 92 results for you
  1. Describing gonad development and gametogenesis in southern Africa’s endemic box jellyfish <em>Carybdea branchi</em> (Cubozoa, Carybdeidae)

    Describing gonad development and gametogenesis in southern Africa’s endemic box jellyfish <em>Carybdea branchi</em> (Cubozoa, Carybdeidae)

    Item type: Journal Article • Journal: African Journal of Marine Science
    Information on the reproductive development of species of box jellyfish (class Cubozoa) is poor globally, despite their significance as potent stingers and worrying projections about range expansions. While most species are confined to tropical and subtropical waters, the South African...
  2. Site Evaluation in Black Wattle with Special Reference to Soil Factors

    Item type: Journal Article • Journal: South African Forestry Journal
    Together with climate, soil characteristics are the most important factors affecting tree growth. However, the attempts in many site evaluation studies to establish a direct relationship between soil factors and tree growth have not been very successful, the exception being...
  3. Use of Ecological Site Classification in the Prediction of Forest Productivity and Response to Fertilisation

    Item type: Journal Article • Journal: South African Forestry Journal
    The principals of biogeoclimatic ecosystem classification were used to stratify sites supporting immature stands of coastal Douglas-fir. The resulting strata were shown to represent unique segments of regional gradients of available soil moisture and nutrients. Regression models indicated strong relationships...
  4. The development of veld assessment in the northern Transvaal savanna I. Red Turfveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Grazing‐induced gradients in pasture species composition were characterized for the red turfveld of the Northern Transvaal savanna. A proposed classification of pasture species response to grazing was developed and the influence of state variables and driving forces other than grazing...
  5. The development of veld assessment in the northern Transvaal savanna II. Mixed bushveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Differences in pasture species composition as a consequence of grazing were used to develop a proposed classification of pasture species response to grazing, for both the Combretum apiculatum and the Acacia tortilis communities of the northern Transvaal mixed bushveld. The...
  6. Habitat preferences of twenty‐three grass species in the Bankenveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Some grass species occur more frequently in certain habitats than in others. There is, however, uncertainty as to exactly which factors are responsible for this phenomenon. Species composition as well as habitat data were collected from plots situated on the...
  7. Quantitative criteria for distinguishing melanic from vertic soil horizons in the central Kruger National Park

    Quantitative criteria for distinguishing melanic from vertic soil horizons in the central Kruger National Park

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Criteria based on shrink-swell potential, viz. linear shrinkage and COLErod, were used to distinguish between melanic and vertic soil horizons of the Mooiplaas region in central Kruger National Park. For linear shrinkage the proposed boundary value separating melanic and vertic...
  8. Influence of abscisic acid on polyphenol oxidase browning potential in avocado

    Influence of abscisic acid on polyphenol oxidase browning potential in avocado

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Various levels of abscisic acid (ABA) were infused into unripened ‘Fuerte’ avocado fruit. After ripening, polyphenol oxidase (PPO) activity was measured, and abscisic acid (ABA) levels monitored. The study showed that an increase in applied ABA increased PPO levels, particularly...
  9. A multivariate approach to a specific problem of grouping maize cultivars

    A multivariate approach to a specific problem of grouping maize cultivars

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The use of multivariate techniques in the analysis of multivariate problems is illustrated by comparing the results of univariate and multivariate techniques applied to the problem of establishing the nutritional requirements of, and the acid tolerance differences between maize cultivars...
  10. The base status criterion in South African soil classification

    The base status criterion in South African soil classification

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Evidence is considered which indicates that the sum of extractable bases and acidity, termed the effective cation exchange capacity (ECEC), is a more reliable criterion than the S-value (sum of exchangeable bases only) for differentiating soils in terms of the...