Articles by Keyword: Maize Yield

Search results for Maize Yield

We found 333 results for you
  1. Atrazine metabolism in field-grown maize and the effect of atrazine phototoxicity on yield

    Atrazine metabolism in field-grown maize and the effect of atrazine phototoxicity on yield

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Maize was grown under field conditions, applying conventional farming practices. Atrazine was sprayed pre- emergence at concentrations of 1,25 I ha−1ai. and 5 I ha−1ai. Severe phytotoxicity symptoms were visible from the first- to about the sixth-leaf stage i.e. 25–30...
  2. 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...
  3. Typifying late-season weather for maize yield prediction

    Typifying late-season weather for maize yield prediction

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Long-term weather data were used to generate typical weather records. By substituting typical weather data for actual late-season weather data it was possible to compute yield predictions using the model CERES-Maize, and compare these with predictions based on full season...
  4. Spruitvorming by mielies: 'n Vergelyking van enkelstammige en spruitvormende plante

    Spruitvorming by mielies: 'n Vergelyking van enkelstammige en spruitvormende plante

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die groei en opbrengs van enkelstammige en meerstammige mielieplante uit dieselfde stand is vergelyk om vas te stel wat die effek van spruitvorming hierop is. Spruitontwikkeling het nie 'n wesentlike invloed op planthoogte en blaaroppervlakte van hoofstamme gehad nie. Spruite...
  5. Unavoidable losses in insecticidal control of <em>Chilo partellus</em> (Swinhoe) (Lepidoptera: Pyralidae) in maize and grain sorghum

    Unavoidable losses in insecticidal control of <em>Chilo partellus</em> (Swinhoe) (Lepidoptera: Pyralidae) in maize and grain sorghum

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Single applications of insecticide against Chilo partellus at different times in the pre-flowering stages of maize and from early whorl to soft dough stage in grain sorghum were compared with multiple applications. Based on yield and the incidence of damaged...
  6. Resistance of South African maize hybrids to maize streak virus

    Resistance of South African maize hybrids to maize streak virus

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Data from maize cultivar trials at Vaalharts over a five-year period were used to evaluate the level of resistance to maize streak virus (MSV) in commercial maize hybrids, and to determine the potential value of such resistance. Maize hybrids presently...
  7. Predictive estimation of maize yield loss caused by <em>Chilo partellus</em> (Swinhoe) (Lepidoptera: Pyralidae) in maize

    Predictive estimation of maize yield loss caused by <em>Chilo partellus</em> (Swinhoe) (Lepidoptera: Pyralidae) in maize

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of Chito partellus (Swinhoe) on growth and yield of maize was investigated in two field experiments, using artificial infestation in cages. The first experiment consisted of five infestation levels, viz. 0, 15, 30, 45 and 60 eggs per...
  8. Fertilizer placement of maize: I. Grain yield and plant growth

    Fertilizer placement of maize: I. Grain yield and plant growth

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Normal fertilizer placement, two deeper than normal, broadcast and no fertilizer treatments were compared in a stubble tillage system in the north-western Free State. Plant growth, as indicated by leaf area, leaf dry mass and stem dry mass, was evaluated...
  9. Maize response to plant population and soil water supply: I. Yield of grain and total above-ground biomass

    Maize response to plant population and soil water supply: I. Yield of grain and total above-ground biomass

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of the level of water deficit on the yield of grain and total above-ground biomass of maize planted at greatly differing densities was investigated in a strictly controlled field experiment, repeated for four seasons. Differences in water supply...
  10. Response of maize to ammonium nitrate, urea and cogranulated urea-urea phosphate

    Response of maize to ammonium nitrate, urea and cogranulated urea-urea phosphate

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Urea fertilizers may lose N by ammonia volatilization when applied in the field. In order to reduce this loss, modified urea compounds are being used. Not all of them reduce ammonia loss and improve crop yields. A field study was...