Articles by Keyword: Lt Em Gt Zea Mays Lt Em Gt L

Search results for Lt Em Gt Zea Mays Lt Em Gt L

We found 33 results for you
  1. Ultrastructural changes in the leaves of <em>Zea mays</em> L. plants treated with atrazine

    Ultrastructural changes in the leaves of <em>Zea mays</em> L. plants treated with atrazine

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine (2-chloro-4-ethylamino-6- isopropylamino-s-triazine). An ultrastructural investigation indicated that mesophyll chloroplasts, consisting of grana, thylakoids and stroma showed severe disintegration. The seemingly unaffected bundle sheath chloroplasts...
  2. Tolerance of South African maize (<em>Zea mays</em> L.) cultivars to atrazine

    Tolerance of South African maize (<em>Zea mays</em> L.) cultivars to atrazine

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Sixty-seven maize cultivars were evaluated for tolerance to atrazine (4 p.p.m. v/v) in nutrient solution. Shoot dry masses (SDM) of only two cultivars, SAB149 and NPP x K64r, were reduced more than 40% and another 14 were reduced by more...
  3. Influence of sub-optimal imbibition temperatures on seed vigour and respiration in maize (<em>Zea mays</em> L.)

    Influence of sub-optimal imbibition temperatures on seed vigour and respiration in maize (<em>Zea mays</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Germination and coleoptile growth of nine seed lots of maize (representing seven cultivars) were studied at 25°C (constant), 13°C (constant) and also at 7°C (7 days) followed by 25°C. Relative germination response to sub-optimal temperatures reflected relative differences in germination...
  4. A field evaluation of the differential tolerance to soil acidity of forty-eight South African maize cultivars

    A field evaluation of the differential tolerance to soil acidity of forty-eight South African maize cultivars

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A field experiment was conducted on a Normandien clay loam (Plinthic Paleudult) to compare the acid tolerance of 48 commercially grown maize (Zea mays L.) cultivars. Cultivars were compared in terms of grain yield, plant height and leaf Al content...
  5. Evaluation of the effects of scorching caused by the directed application of a paraquat-containing herbicide mixture to the base of maize plants at various ages

    Evaluation of the effects of scorching caused by the directed application of a paraquat-containing herbicide mixture to the base of maize plants at various ages

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of herbicides which scorched the lower leaves of maize was compared in three seasons. The first season was relatively dry whilst the other two were wetter seasons. A mixture of cyanazine + atrazine + paraquat + a wetting...
  6. Preliminary studies on the inheritance of atrazine tolerance in maize (<em>Zea mays</em> L.)

    Preliminary studies on the inheritance of atrazine tolerance in maize (<em>Zea mays</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Thirty-three maize (Zea mays L.) inbreds were screened for tolerance to atrazine (2-chloro-4-ethylamino-6- isopropylamino-1,3,5-triazine) in a glasshouse using a sand culture technique. Tolerance ranged from 95,7–51,0% of the control. The continuous pattern of tolerance exhibited by the inbreds indicated polygenic...
  7. 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...
  8. Implikasies van die oesindeks by navorsing verbouing van mielies

    Implikasies van die oesindeks by navorsing verbouing van mielies

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die oesindeks van mielies is bepaal in vier veldproewe. Verskille tussen mieliekultivars het voorgekom. Kultivars wat hoë graanopbrengste gelewer het in 'n kultivarproef, het ook deurgaans hoë oesindekswaardes gehad. In 'n langtermyn- bemestingsproef het behandelings wat kalium ontvang het, hoër...
  9. Die invloed van planttyd en plantdigtheid op die duurte en tempo van graanvul van mielies (<em>Zea mays</em> L.)

    Die invloed van planttyd en plantdigtheid op die duurte en tempo van graanvul van mielies (<em>Zea mays</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die invloed van planttyd en plantdigtheid op die lengte van die graanvulperiode en die graanvultempo van mielies is in veldproewe ondersoek. Plantdigtheid het die periode en tempo van graanvul nie betekenisvol beïnvloed nie. Die graanvulperiode het betekenisvol toegeneem terwyl die...
  10. South African Journal of Plant and Soil Instructions to Authors

    South African Journal of Plant and Soil Instructions to Authors

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Single maize plants (Zea mays L cv. SNK 2244) were grown in sand culture in polyethylene tubes (300 mm × 110 mm diam.) in a glasshouse. Apparent photosynthetic rate was determined at intervals during the growing period, using a portable...