Articles by Keyword: Phosphorus

Search results for Phosphorus

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  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. 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...
  3. Die invloed van bemesting op die spesiesamestelling en basale bedekking van beweide veld in die Potchefstroom‐omgewing

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The impact of fertilization on veld in the Potchefstroom area was investigated. Nitrogen and phosphorus were applied annually from 1972/73 until 1981/82. The control plots and the fertilized plots were grazed with year‐old steers. Species composition and basal cover were...
  4. Responses of Italian ryegrass to phosphorus on highly‐weathered soils

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Italian ryegrass (Loliwn multiflorum cv. Midmar) responses to fertilizer P were studied in field experiments under irrigation on highly‐weathered ferrallitic soils at two localities in Natal. Each experiment was conducted over two seasons (1985 and 1986), the pasture being re‐established...
  5. Defoliation effects on resource allocation in Arizona cottontop (<em>Digitaria californica</em>) and Lehmann lovegrass (<em>Eragrostis lehmanniana</em>)

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Arizona cottontop (Digitaria californica), a bunchgrass native to the Chihuahuan and Sonoran Deserts in North America, and Lehmann lovegrass (Eragrostis lehmanniana), a bunchgrass introduced to the southwestern USA from southern Africa, were defoliated and examined for above‐ and below‐ground productivity,...
  6. Land application of sewage sludge: Phosphorus considerations

    Land application of sewage sludge: Phosphorus considerations

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Phosphorus considerations are gaining increasing attention where sewage sludges are applied to land because of the continuing trend of rising P levels in sludges and the growing concern for environmental pollution and nutrient recycling issues. P in sludges has reached...
  7. Response of five soybean (<em>Glycine max</em> (L.) Merr.) cultivars to lime and phosphorus on an acid Normandien subsoil

    Response of five soybean (<em>Glycine max</em> (L.) Merr.) cultivars to lime and phosphorus on an acid Normandien subsoil

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Five soybean cultivars (Hill, Geduld, Forrest, Welkom and Oribi), previously selected for Al tolerance or sensitivity by a rapid seedling evaluation method, were grown in acid soil treated with varying rates of lime and P. After 35 days the plants...
  8. Genotypic tolerance of selected dry bean (<em>Phaseolus vulgaris</em> L.) cultivar s to soluble Al and to acid, low P soil conditions

    Genotypic tolerance of selected dry bean (<em>Phaseolus vulgaris</em> L.) cultivar s to soluble Al and to acid, low P soil conditions

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Twelve dry bean cultivare were grown for seven days on filter paper soaked with nutrient solution containing a range of up to 10 mmol Al dm−3. Differential response to Al toxicity, measured as taproot elongation, occurred at Al concentrations of...
  9. Die invloed van fosfor, nitraat en ammonium op die opname en vervoer van stikstof en fosfor en op die groei van koring

    Die invloed van fosfor, nitraat en ammonium op die opname en vervoer van stikstof en fosfor en op die groei van koring

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    In 'n waterkultuureksperiment met koring is die invloed van verskillende P-toedienings (0,02 tot 5,0 me H2PO4 dm−3) en van verskillende NH4:NO3-verhoudings (0:15 tot 12:3) met 'n Hoagland-voedingsoplossing (no. 2) as kontrole bestudeer. Normale groei is reeds by 'n laer P-voorsiening...
  10. Invloed van bemesting op die oliekonsentrasie oliekwaliteit van sonneblomsaad

    Invloed van bemesting op die oliekonsentrasie oliekwaliteit van sonneblomsaad

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Influence of fertilization on the oil concentration and oil quality of sunflower seed. Fertilizer trials (N,P,K and lime) were conducted over two seasons at three localities. Results indicate that 150 kg N ha−1 fertilizer decreased the oil concentration of the...