As you know when experiments are replicated over time and location, they are named “combined experiments”. The analysis of combined experiments is somewhat different from the other simple experiments and sometimes are treated a split-plot experiment in time or space. What I do know is that the F-ratios are calculated differently (see McIntosh, 1983; Moore and Dixon, 2015). Is there anyone who is familiar with the way of analyzing data for this type of experiments using a mixed model in Minitab and SPSS? I setup an experiment with four tillage systems as fixed factor and three sampling years as random factor, and was not able to calculate the correct ANOVA (F values) according to McIntosh (1983) and Moore and Dixon ( 2015). Any help is highly appreciated.