**2.4. Statistical analysis**

All data were evaluated in R 3.0.2 (R Core Development Team 2013). The simultaneous tests of general linear hypotheses, Dunnett Contrasts, were used for multiple comparisons of the means. Summarized data are reported as a mean values ± standard deviations. Correlation coefficients between productivity components and grain-quality parameters and *p* values were calculated using the GenStat software (10th edition). A *p*-value ≤0.05 was considered statistically significant.
