Published online by Cambridge University Press: 27 March 2009
Two examples are given of field trials for which randomized blocks would seem the most suitable design, but in which special considerations of the future of the trial or the nature of the treatments make complete randomization impossible or impracticable. A type of design which takes account of these difficulties is described, together with the appropriate methods of analysis.
The author wishes to thank Mr S. C. Pearce for much valuable advice throughout this investigation.