Articles by Keyword: Nitrogen

Search results for Nitrogen

We found 166 results for you
  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. Fertilization of southern tall grassveld of natal: Effects on botanical composition and utilization under grazing

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The long‐term effects of nitrogen, phosphate and lime on change in botanical composition and utilization under grazing of Southern Tall Grassveld of Natal are presented. Nitrogen, phosphate, lime and type of nitrogen affected botanical composition significantly. Generally, fertilization had the...
  7. Identification of companion legumes for midmar Italian ryegrass

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    In a preliminary investigation seven legumes were planted alone and in combination with Lolium multiflorum cv. Midmar. The pure stands of legumes were harvested at either four, five or six week cutting intervals, while the pure stands of Lolium multiflorum...
  8. The effect of form and level of nitrogen fertlization on the yield of <em>Digitaria eriantha</em> Steud*

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    On dryland Digitaria eriantha ammonium sulphate and limestone ammonium nitrate were superior to potassium nitrate and urea. With reference to the level of nitrogen fertilization it was found that levels in excess of 300 kg N/ha, and up to 400...
  9. Fertilizer requirements and production of <em>Anthephora pubescens</em> nees on a soil of the mangano series in the northern cape

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The reaction of Anthephora pubescens to N, P and K fertilization was evaluated from 1976 to 1983. Dry matter production at N levels of 0; 75 and 150 kg/ha were 1,9; 2,2 and 2,3 ton/ha respectively. This relative poor reaction...
  10. Die produksie van smutsvingergras in die wes‐transvaal<sup>1</sup>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Die produksie van Smutsvingergras (Digitaria eriantha) is in yerskeie proewe in die Hoëveldstreek, op Potchefstroom, in die verlede bepaal. Hierdie proewe is oor ‘n lang periode op verskillende grondsoorte en met verskillende bemestingspeile uitge‐voer. Alle resultate is saamgevoeg en met...