For combining results from independent experiments, it is essential that information about the precision of the estimates of treatment
effects is available. In publications of horticultural experiments, the results of multiple comparisons tests are often reported without
suffi cient information about the precision of the experiments. Based on limited information of the precision of an experiment such as
treatments with the same letter are not signifi cantly different, we develop a method for extracting a possible range of the precision of
the experiment which can then be used for meta-analysis. The procedure is demonstrated using a real data example where alternatives
to methyl bromide are studied in pre-plant soil fumigation. We also provide an R program which computes the possible range of the
precision.