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Euphytica

, Volume 68, Issue 1–2, pp 27–32 | Cite as

Harvest index versus grain/straw-ratio. Theoretical comments and experimental results on the comparison of variation

  • Manfred Huehn
Article

Summary

The variation of the two parameters, harvest index and grain/straw-ratio, has been theoretically compared by applying the relative measure coefficient of variation. The harvest index exhibits a clear superiority (= lower variation) compared to the grain/straw-ratio.

Applications to ten European winter oilseed rape cultivars and lines are in an excellent agreement with the theoretical findings.

Key words

harvest index grain/straw-ratio variation winter oilseed rape 

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References

  1. Donald C.M. & J.Hamblin, 1976. The biological yield and harvest index of cereals as agronomic and plant breeding criteria. Advances in Agronomy 28: 361–405.Google Scholar
  2. Grosse, F., 1989. Untersuchungen zur Ertragsbildung und Ertragsstruktur in einem Winterrapssortiment (Brassica napus L.). Diss. Univ. Kiel.Google Scholar
  3. Hühn M., 1990a. Comments on the calculation of mean harvest indices. Journal of Agronomy and Crop Science 165: 86–93.Google Scholar
  4. Hühn M., 1990b. On the variability of harvest indices. Journal of Agronomy and Crop Science 164: 271–281.Google Scholar
  5. Hühn M., F.Grosse & J.Léon, 1991. On harvest indices of winter-oilseed rape (Brassica napus L.). Journal of Agronomy and Crop Science 167: 299–309.Google Scholar
  6. Hühn M., 1991. Character associations among grain yield, biological yield and harvest index. Journal of Agronomy and Crop Science 166: 308–317.Google Scholar
  7. Hühn M., 1992. Experimental results on the frequency distribution of harvest indices of winter oilseed rape. Journal of Agronomy and Crop Science 169: 61–69.Google Scholar
  8. Hühn, M., 1994. Harvest index versus grain/straw-ratio-Theoretical comments on their variability, skewness and kurtosis. (in preparation).Google Scholar
  9. Johnson N.L. & S.Kotz, 1970. Distributions in statistics. Continuous univariate distributions—1. John Wiley & Sons, New York Chichester Brisbane Toronto Singapore.Google Scholar
  10. Keeping E.S., 1962. Introduction to Statistical Inference. D. van Nostrand, New York.Google Scholar
  11. Kendall M.G. & A.Stuart, 1958. The advanced theory of statistics. Vol. 1 (Distribution Theory). Charles Griffin & Company Lim. London.Google Scholar
  12. Rasch D., 1978. Einführung in die mathematische Statistik. I. Wahrscheinlichkeitsrechnung und Grundlagen der mathematischen Statistik. 2., ber. Aufl., VEB Deutscher Verlag der Wissenschaften, Berlin.Google Scholar

Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • Manfred Huehn
    • 1
  1. 1.Institute of Crop Science and Plant BreedingUniversity KielKielGermany

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