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The effect of irrigation and nitrogen fertilizer on rapeseed (Brassica napus) production in South-Eastern Australia

II. Nitrogen accumulation and oil yield

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Summary

A field trial was conducted to determine the response of rapeseed (Brassica napus cv. Marnoo) to two irrigation treatments and six nitrogen fertilizer treatments. Response to nitrogen was greater with than without irrigation. Oil content was increased with irrigation but decreased under increasing nitrogen application, and was inversely related to seed nitrogen concentration. Oil yields averaged 1,168 kg ha−1 under irrigated treatments compared with 835 kg ha−1 under rainfed treatments. Maximum oil yield (approx. 1,557 kg ha−1) was obtained from the irrigated treatment fertilized with 100 kg N ha−1 applied at sowing.

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Author notes

  1. G. C. Wright

    Present address: Queensland Department of Primary Industry, P.O. Box 23, 4610, Kingaroy, Queensland, Australia

Authors and Affiliations

  1. Department of Agriculture and Rural Affairs, Institute for Irrigation and Salinity Research, 3616, Tatura, Victoria, Australia

    C. J. Smith & G. C. Wright

  2. Department of Agriculture and Rural Affairs, Sub-District Office, 53–55 Meikeljohn Street, 3636, Numurkah, Victoria, Australia

    M. R. Woodroofe

Authors
  1. C. J. Smith
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  2. G. C. Wright
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  3. M. R. Woodroofe
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Smith, C.J., Wright, G.C. & Woodroofe, M.R. The effect of irrigation and nitrogen fertilizer on rapeseed (Brassica napus) production in South-Eastern Australia. Irrig Sci 9, 15–25 (1988). https://doi.org/10.1007/BF00292140

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  • DOI: https://doi.org/10.1007/BF00292140

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