H. D. Patterson

Block designs for variety trials

In this paper we present a series of resolvable incomplete block designs suitable for variety trials with any number of varieties v in the range 20 ≤ v ≤ 100. These designs usefully supplement existing square and rectangular lattices. They are not necessarily optimal in the sense of having smallest possible variances but their efficiencies are known to be high.

Design Keys for Factorial Experiments

This paper describes the use of design keys in (a) identifying treatment effects with particular plot contrasts in factorial experiments and (b) constructing the designs. The method covers a wide variety of block structures. It is available for both symmetrical and asymmetrical designs.