Articles by Keyword: Potassium

Search results for Potassium

We found 45 results for you
  1. 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...
  2. Fisiologiese blaarabnormaliteite en bolopbrengs by katoen (<em>Gossypium hirsutum</em> L.) soos deur kalium-, kalsium- en boorvoeding beïnvloed

    Fisiologiese blaarabnormaliteite en bolopbrengs by katoen (<em>Gossypium hirsutum</em> L.) soos deur kalium-, kalsium- en boorvoeding beïnvloed

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Physiological leaf abnormalities and boll yield of cotton (Gossypium hirsutum L.) as affected by potassium, calcium and boron nutrition. A pot trial with a sand medium and two levels each of K, Ca and B nutrition, factorially arranged, was carried...
  3. Potassium effects on stalk strength, premature death and lodging of maize (<em>Zea mays</em> L.)

    Potassium effects on stalk strength, premature death and lodging of maize (<em>Zea mays</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    In a field trial with maize, applications of potassium (K) proved to have a highly significant effect on stalk strength, premature death, root lodging and stalk breakage. A week prior to harvest the percentage of lodged plants varied from 77%...
  4. 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...
  5. Effect of Ca, K and B supply on water-stress induced chlorophyll loss from tobacco and cotton leaf discs

    Effect of Ca, K and B supply on water-stress induced chlorophyll loss from tobacco and cotton leaf discs

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A study was made of the influence of Ca:K ratios and B levels on the chlorophyll content of tobacco and cotton leaves grown under glasshouse conditions. Excised leaf discs were floated on a solution of polyethylene glycol 6000 to study...
  6. The accumulation of nitrate in Kikuyu grass (<em>Pennisetum clandestinum</em> Hochst)

    The accumulation of nitrate in Kikuyu grass (<em>Pennisetum clandestinum</em> Hochst)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A study was made of some of the factors responsible for the accumulation of excessive amounts of nitrate in certain Kikuyu pastures. Accumulation, mainly in stem tissue, is the nett result of several contributing processes. Climatic conditions causing a decline...
  7. Reproduktiewe opbrengskomponente van mielies (<em>Zea mays</em> L.) soos beïnvloed deur verskillende grondvrugbaarheids- en be- sproeiingspeile

    Reproduktiewe opbrengskomponente van mielies (<em>Zea mays</em> L.) soos beïnvloed deur verskillende grondvrugbaarheids- en be- sproeiingspeile

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die reproduktiewe opbrengskomponente van mielies (Zea mays L.) is gedurende die 1982/83-seisoen gemonitor by sekere behandelings van 'n langtermyn bemestings- en besproeiingsproef met twee peile elk van besproeiing (W), stikstof (N), fosfor (P), kallum (K) en kompos (M). Addisionele besproeiing...
  8. Effect of Ca, K and B supply on growth of cotton (<em>Gossypium hirsutum</em> L.) and tobacco (<em>Nicotiana tabacum</em> L.)

    Effect of Ca, K and B supply on growth of cotton (<em>Gossypium hirsutum</em> L.) and tobacco (<em>Nicotiana tabacum</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of Ca:K ratios and B nutrition was investigated using tobacco and cotton grown in Mitcherlich pots with sand. A nutrient solution with three different ratios of Ca:K and two boron levels was used. Treatments were arranged factorially (3...
  9. Response of subterranean clover to liming and phosphate fertilization on a low potassium soil

    Response of subterranean clover to liming and phosphate fertilization on a low potassium soil

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Several Trifolium varieties grown in an acid Bokkeveld shale soil responded positively to small additions of lime and P. Growth was probably limited by a K deficiency, and it is unlikely that Trifolium species could be successfully grown as cover...
  10. Kaliumvaslegging in 'n Arcadia-grond: I. Vaslegging onder natuurlike toestande

    Kaliumvaslegging in 'n Arcadia-grond: I. Vaslegging onder natuurlike toestande

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Ten einde die mate van kaliumvaslegging op 'n grand van die Arcadia-serie onder natuurlike toestande na te gaan, is grondmonsters van 'n reeks proefpersele geneem. Die persele het verskillende hoeveelhede kaliumbemesting oor 'n periode van 12 jaar ontvang. Die monsters...