Pearson’s bivariate correlation coefficients between plant height, dry matter content and dry matter yield were calculated and these showed significant relationships between these parameters (Table 6). Dry matter content was negatively and significantly correlated with dry matter yield (r = -0.430) of the hybrids, implying that these two attributes cannot be significantly improved. Though plant height was also negatively correlated with dry matter content (r = -0.434), there was a significantly strong