Articles by Keyword: Closed Hydroponic System

Search results for Closed Hydroponic System

We found 157 results for you
  1. Comparative performance of tomato cultivars cultivated in two hydroponic production systems

    Comparative performance of tomato cultivars cultivated in two hydroponic production systems

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Cultivar selection for different hydroponic production systems is an important management decision, potentially impacting the tomato grower’s profitability. Knowledge on the performance of tomato cultivars, in specific hydroponic systems (open-bag and closed system) under South African conditions, is still very...
  2. The Blackwood Group System: its relevance for sustainable forest management in the southern Cape

    Item type: Journal Article • Journal: South African Forestry Journal
    The invasion status of Australian blackwood, Acacia melanoxylon, is assessed against its value as a commercial tree in the southern Cape forests. The species was introduced from Australian rain forests and planted extensively in the southern Cape forests since 1909...
  3. ‘N vergelyking tussen <em>digitaria eriantha</em> steud. subsp. <em>eriantha</em> (smutsvingergras) en <em>eragrostis curvula</em> (schrad.) nees (oulandsgras) as hooigewasse vir skape<sup>1</sup>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Smutsvingergras‐ en oulandsgrashooi is by drie bemestingspeile, naamlik 30 kg N + 2,8 kg P ha‐1; 90 kg N + 8,3 kg P ha‐1 en 150 kg N + 13,8 kg P ha‐1 geproduseer. Die hooi is in alle voorgenoemde...
  4. How economic are the farming units of Leliefontein, Namaqualand?

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Nomadic pastoralism has been practised in Leliefontein for centuries. In 1984, the area was formally divided into 47 so‐called ‘economic units’ on the assumption that this agricultural approach would (a) promote development in the region and (b) introduce conservation management...
  5. Die evaluering van vier <em>Eragrostis curvula</em> ekotipes met weidende skape

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The evaluation of four Eragrostis curvula ecotypes with grazing sheep. Four ecotypes of Eragrostis curvula, namely, Cape Province 5, Ermelo, Pearston 204 and Makwassie 150 were evaluated in a grazing trial with sheep, at three stocking rates, during two growing...
  6. The Potch System: An approach to the management of semi‐arid grasslands in southern Africa

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    A host of grassland management systems have been published and recommended. Whereas earlier approaches to grassland management emphasized the systematic resting aspect, the systems published since 1966 have tended to stress the degree of utilization of the grassland sward. In...
  7. Maize cropping system analysis and economic comparison for two environments

    Maize cropping system analysis and economic comparison for two environments

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of different maize cropping systems and economic implications were investigated at two localities from 1994 to 2000. Soil types differed, and the topsoil at Bloekomspruit and Viljoenskroon contained 17% and 5% clay, respectively. The five primary cropping systems...
  8. An investigation into soil fertility in two resource-poor farming communities in KwaZulu-Natal (South Africa)

    An investigation into soil fertility in two resource-poor farming communities in KwaZulu-Natal (South Africa)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Low soil fertility is one of the major constraints affecting agriculture in Africa, a phenomenon that is also evident in fields of resource-poor farmers in KwaZulu-Natal. However, nutrient depletion status is field specific. This paper investigates the hypothesis that among...
  9. Web-based teaching, learning and research using accessible real-time data obtained from field-based agrometeorological measurement systems<xref rid="FN0001"/>

    Web-based teaching, learning and research using accessible real-time data obtained from field-based agrometeorological measurement systems<xref rid="FN0001"/>

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    To enhance teaching and learning in agrometeorology and allied disciplines, a Web-based data and information system was developed. The system uses field-based agrometeorologcial measurements, from automatic weather, radiation and temperature stations, to collect and display near real-time and previous data...
  10. A Characterization of the Prime Closed Filter Compactification of a Topological Space

    A Characterization of the Prime Closed Filter Compactification of a Topological Space

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    The prime compactification whose points are the prime closed filters can be defined for a general topological space and is naturally functorial. We derive several properties of this compactification and present a characterization.