In a diallel layout of eight forage plant varieties in pure stand and all possible mixtures of alternate rows in the field, the first year's growth was studied and an interpretation of competitive relations was attempted by a number of recent statistical techniques. The diallel test proved valuable for pin pointing superior combinations. Although the first year's results cannot be regarded as typical for mature forages, many results were comparable with an earlier long-term study ofCaputa (1948). Significant correlations were found between productivity and light interception estimates in these plant communities.