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  • Physical and physiological seed characteristics influencing wheat stand establishment

    Creator:
    Ahmad, Shahbaz
    Abstract:
    Rate of emergence is an important character for stand establishment. Ability of wheat seeds to germinate and emerge rapidly under different climatic conditions may be regulated by physical and/or physiological characteristics. Seeds of 26 wheat varieties representing five classes were produced in two different environments (Moro and Corvallis, OR). Seed...
    Resource Type:
    Dissertation
    Full Text:
    germina- tion rate index (GRI) for each seed lot under 15 different combinations of water potential and

  • An evaluation of weed interference in rice grown on hydromorphic soils in West Africa

    Creator:
    Diop, Amadou Makhtar
    Abstract:
    Field, screenhouse, and laboratory experiments were conducted to study weed interference in rice grown on hydromorphic soils at the International Institute of Tropical Agriculture (IITA) at Ibadan, Nigeria. Rice and weeds emerged at the same time, 1 week after planting. Weed dry weight was significantly reduced when the crop was...
    Resource Type:
    Dissertation
    Full Text:
    be due to interference with growth processes in plants or other causes such as altered pH, nutrient