Single site design considerations in onfarm experiments

Walker, P. (1991). Single site design considerations in onfarm experiments. In H.J.W. Mutsaers and P. Walker, On-farm research in theory and practice. Proceedings of a workshop on design and analysis of on-farm trials 27 February to 3 March 1989. Ibadan, Nigeria: IITA, (p. 39-45).

I do not propose to say much about the type of verification trial where a single plot using a package of improvements is established on the fields of several farmers. Although they often provide useful information over an area, I consider them to be little more than demonstration plots. Where we have several plots per site, on the other hand, we are forced towards experiments