Skip to main content
    • Aa
    • Aa
  • Get access
    Check if you have access via personal or institutional login
  • Cited by 15
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Pertuzé, Ricardo Bravo, Rodrigo and Silva, Paola 2016. Radicchio (Cichorium intybus l.) variety selection for the Chilean central area. Scientia Horticulturae, Vol. 198, p. 197.

    Aldred, R. E. L. Bailey, R. A. Mckay, B. D. and Wanless, I. M. 2014. Circular designs balanced for neighbours at distances one and two. Biometrika, Vol. 101, Issue. 4, p. 943.

    Kiær, Lars P. Skovgaard, Ib M. and Østergård, Hanne 2012. Effects of inter-varietal diversity, biotic stresses and environmental productivity on grain yield of spring barley variety mixtures. Euphytica, Vol. 185, Issue. 1, p. 123.

    Stringer, Joanne K. Cullis, Brian R. and Thompson, Robin 2011. Joint Modeling of Spatial Variability and Within-Row Interplot Competition to Increase the Efficiency of Plant Improvement. Journal of Agricultural, Biological, and Environmental Statistics, Vol. 16, Issue. 2, p. 269.

    Martin, R.J. and Eccleston, J.A. 2004. Variance-balanced designs under interference for dependent observations. Journal of Statistical Planning and Inference, Vol. 119, Issue. 1, p. 207.

    David, O. Kempton, R. A. and Nevison, I. M. 1996. Designs for controlling interplot competition in variety trials. The Journal of Agricultural Science, Vol. 127, Issue. 03, p. 285.

    Ainsley, A. E. Dyke, G. V. and Jenkyn, J. F. 1995. Inter-plot interference and nearest-neighbour analysis of field experiments. The Journal of Agricultural Science, Vol. 125, Issue. 01, p. 1.

    Bänziger, M. Lafitte, H.R. and Edmeades, G.O. 1995. Intergenotypic competition during evaluation of maize progenies under limited and adequate N supply. Field Crops Research, Vol. 44, Issue. 1, p. 25.

    Talbot, M. Milner, A. D. Nutkins, M. A. E. and Law, J. R. 1995. Effect of interference between plots on yield performance in crop variety trials. The Journal of Agricultural Science, Vol. 124, Issue. 03, p. 335.

    BRADSHAW, J E 1994. Assessment of five cultivars of potato (Solatium tuberosum L.) in a competition diallel. Annals of Applied Biology, Vol. 125, Issue. 3, p. 533.

    CONNOLLY, T CURRIE, I D BRADSHAW, J E and McNICOL, J W 1993. Inter-plot competition in yield trials of potatoes (Solanum tuberosum L.) with single-drill plots. Annals of Applied Biology, Vol. 123, Issue. 2, p. 367.

    Pithuncharurnlap, M. Basford, K.E. and Federer, W.T. 1993. NEIGHBOUR ANALYSIS WITH ADJUSTMENT FOR INTERPLOT COMPETITION. Australian Journal of Statistics, Vol. 35, Issue. 3, p. 263.

    Stelling, D. Ismail, M. H. Ebmeyer, E. Fraukn, M. and Robbelen, G. 1990. Selection in Early Generations of Dried Peas, Pisum sativum L. III. Plot Size and Plot Type. Plant Breeding, Vol. 105, Issue. 3, p. 238.

    Aastveit, Are H. Buraas, Trond and Gullord, Magne 1989. Interplot Competition in Oats and Barley Variety Trials. Acta Agriculturae Scandinavica, Vol. 39, Issue. 2, p. 159.

    HEATH, M.C. and HEBBLETHWAITE, P.D. 1985. The Pea Crop.


Inter-plot competition in variety trials of field beans (Vicia faba L.)

  • R. A. Kempton (a1) and G. Lockwood (a1)
  • DOI:
  • Published online: 01 March 2009

Four trials were carried out to investigate the effect of inter-plot competition on seed yield and plant height of field beans using experimental designs balanced for neighbours. One trial tested four varieties ranging in final height from 25 to 100 cm and sown in four-row plots with 30 cm spacing between rows and one blank row between plots. When grown between plots of a dwarf variety, the plot yield of the tallest variety was increased by 20% compared with its pure stand yield: a complementary reduction in yield was shown by the dwarf variety when grown between plots of the tall. The effect on the yield of the inner rows of the plot was somewhat smaller than that of the outer rows but still significant. Another trial with six commercial varieties differing in final height by less than 15 cm showed no differential effects of inter-varietal competition on yield. In two trials with six varieties of widely differing heights planted with 50 cm spacing between rows, but no gap between plots, plot yield was strongly affected by the neighbouring variety in the trial with single-row plots, while yields from the four-row trial showed a large interaction between variety and inner and outer row position, again indicative of inter-variety competition. The yield response to competition could be described by a common linear regression on the excess height of plot neighbours: there was little evidence of varietal differences in sensitivity or aggressiveness.

Plant height showed a positive response to height of plot neighbours in all four trials, whilst in the single-row trial, the ratio of grain yield to total dry-matter production (harvest index) was negatively related to excess height of neighbours.

The results suggest that, when testing varieties differing in height by more than 20 cm, at least two buffer rows, e.g. six-row plots with the centre two rows harvested, are required to obtain a true comparison of pure-stand yield. Alternatively, when this procedure would result in an unacceptable use of resources, one of the statistical models adapted in this paper may be used to adjust variety yields for pure stands.

Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

M. G. R. Cannell , C. K. Njuguna , E. D. Ford , R. Smith & H. M. Ross-Parker (1977). Variation in yield among competing individuals within mixed genotype stands of tea: a selection problem. Journal of Applied Ecology 14, 969985.

N. F. Jensen & W. T. Federer (1964). Adjacent row competition in wheat. Crop Science 4, 641645.

S. Sjödin (1971). Induced morphological variation in Viciafaba L. Hereditas 67, 155180.

E. J. Williams (1962). The analysis of competition experiments. Australian Journal of Biological Science 15, 509525.

R. M. Williams (1952). Experimental designs for serially correlated observations. Biometrika 39, 152167.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

The Journal of Agricultural Science
  • ISSN: 0021-8596
  • EISSN: 1469-5146
  • URL: /core/journals/journal-of-agricultural-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *