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    Effect of seed-placed phosphorus and sulphur fertilizers on canola plant stand, early season biomass and seed yield

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    Grenkow MSc Thesis (July 30) df2.pdf (1.472Mb)
    Date
    2013-09-10
    Author
    Grenkow, Laryssa
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    Abstract
    Seed-placed phosphorus (P) and sulphur (S) fertilizers can reduce canola plant stands. Field studies were conducted to determine the effect of various sources and rates of seed-placed P and S fertilizers on canola plant stand, early season biomass accumulation and seed yield. Conventional granular P and S blends increased the risk of seedling damage, but increased the frequency of yield response. Liquid fertilizers were similar in seedling damage but generally less effective in increasing seed yield compared to granular fertilizers. Novel fertilizers were more seed-safe but less reliable than conventional sources in increasing seed yield. A growth room experiment was conducted to determine the effect of soils from different landscape positions on the toxicity of seed-placed ammonium sulphate (AS) and monoammonium phosphate (MAP). Canola emergence was reduced and delayed by seed-placed MAP and AS. Ammonium sulphate in particular has a high risk of NH3 toxicity on calcareous hilltop soils
    URI
    http://hdl.handle.net/1993/22150
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    • FGS - Electronic Theses and Practica [25522]

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