Design and analysis of multi-site agronomic evaluation trials

Abstract

The practice of doing a single comparative trial at a particular site and extrapolating results from that site to many others, ignores the potential variability in results which may occur when the same treatments are applied in different environments. In order to overcome this difficulty with on-farm investigative developments, the concept has been extended. Single replicates of simple experiments at many sites are proposed as a method for the agronomic evaluation of plants, fertilisers, and weed or pest control strategies. It is concluded that this extension will allow more general conclusions and more widespread technology transfer to take place. © 1993 Taylor & Francis Group, LLC.