Articles by Keyword: Nitrogen Utilization

Search results for Nitrogen Utilization

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  1. Die rol wat nitraat: ammoniumverhoudings speel in die effektiewe benutting van stikstof by <em>Zea mays</em> L.

    Die rol wat nitraat: ammoniumverhoudings speel in die effektiewe benutting van stikstof by <em>Zea mays</em> L.

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die invloed van verskillende nitraat: ammoniumverhoudings by sub- en supra-optimale stikstofkonsentrasies op die opname en benutting van stikstof is ondersoek. Effektiewe stikstofbenutting is in terme van saadopbrengs per eenheid opgeneemde stikstof gemeet. Die beste nitraat: ammoniumverhouding was 3:1 by 100...
  2. Invloed van bemesting op sonneblomme. II. N-, P- en K-verwydering deur die gewas

    Invloed van bemesting op sonneblomme. II. N-, P- en K-verwydering deur die gewas

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    N-, P- en K-ontledings is gedoen op saad- en plantmonsters wat verkry is uit twee NPK bemestingsproewe en een N × P × kalkproef. Die resultate is gebruik om die N-, P- en K-verwydering deur verskillende plantdele te bereken. Daar...
  3. Utilization of initially-applied labelled ammonium nitrate by three successive crops

    Utilization of initially-applied labelled ammonium nitrate by three successive crops

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The aim of the study was to compare N uptake from initially-applied NH4 + and NO3- ions and to compile a balance sheet for applied fertilizer N. In a pot experiment, maize, sorghum and sunflower plants were grown in succession,...
  4. Seasonal and sub-seasonal oxygen and nutrient fluctuations in an embayment of an eastern boundary upwelling system: St Helena Bay

    Seasonal and sub-seasonal oxygen and nutrient fluctuations in an embayment of an eastern boundary upwelling system: St Helena Bay

    Item type: Journal Article • Journal: African Journal of Marine Science
    Seasonal, sub-seasonal and spatial fluctuations in bottom dissolved oxygen (DO) were examined in St Helena Bay, South Africa’s largest and most productive embayment, between November 2013 and November 2014. Alongshore bay characteristics were assessed through comparison of variables along the...
  5. Influence of Soil Organic Matter Content on the Responsiveness of <em>Eucalyptus grandis</em> to Nitrogen Fertiliser

    Item type: Journal Article • Journal: South African Forestry Journal
    It is widely recognised that the inherent nitrogen (N) mineralisation capacity of a soil is directly related to the organic matter content. Consequently, in estimating the N requirements of Eucalyptus grandis at planting this mineralisation potential must be taken into...
  6. The Amelioration of <em>Pinus patula</em> Mortality on Former Agricultural Sites through Fertilisation: A Bioassay and Greenhouse Study

    Item type: Journal Article • Journal: South African Forestry Journal
    Recent expansion of the timber industry into areas previously used for agronomic production has, in many cases, resulted in poor growth of Pinus patula and P. elliottii seedlings and in certain instances complete stand failure. A bioassay study was initiated...
  7. The effect of nitrogen on the development and photosynthetic activity of <em>digitaria eriantha</em> steud. subsp. <em>eriantha</em>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Digitaria eriantha Steud. subsp. eriantha, plants were grown under controlled conditions and treated with different concentrations and forms of nitrogen. The plants showed a preference for nitrate nitrogen, as opposed to ammonium nitrogen, with greater total dry matter production and...
  8. The production potential of pure and mixed stands of <em>Eragrostis curvula</em> and <em>Medicago sativa</em> on the eastern transvaal highveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Over a five year period pure stands of Medicago sativa and mixtures of M. sativa and Eragrostis curvula have done as well and better than E. curvula receiving 300 kg N/ha, and considerably better than treatments receiving 200 and 100...
  9. Die uitwerking van ‘n hoë veedigtheid op die benutting van etlike spesies in die sentrale hoër Karoo

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    ‘n Proef is uitgevoer om die uitwerking van ‘n hoë veedigtheid vir ‘n kort periode op die benutting van 11 spesies in die Sentrale Hoër Karoo te bepaal. Benutting is bepaal deur die droë massa van 50 plante per spesie...
  10. The influence of different forms and concentrations of nitrogen on the growth and metabolism of <em>digitaria eriantha</em> and <em>chloris Gayana</em> grown under saline conditions

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Chloris gayana and Digitaria eriantha plants were watered with nutrient media containing a high concentration of sodium chloride (150 mM) and either high (200 mg/l) or low (25 mg/l) concentrations of nitrate nitrogen and ammonium nitrogen. Dry mass and leaf...