Comparative analysis of the yield of spring barley cultivars in the regions of Sadovo and Karnobat.

The aim of present study was to investigate the comparative analysis of the yield of spring barley and the coefficient of ecological valence in the regions of Sadovo and Karnobat. Seven spring barley cultivars were planted in the first and second decade of march, in comparative cultivars trials on the block method in four repetitions of an area of 10 m2, with sowing rate of 450 germinating seeds per m2 in the region of Sadovo and Karnobat. They were assessed against IASAS used standard french variety Josefin. The statistical processing of the results was carried out by ANOVA. The coefficient of ecological valence (W) is fixed on the model of Wricke. The analysis can be concluded that the varieties grown in the region of Sadovo showed better ecological plasticity, but gave lower yields, in the region of Karnobat were more productive but difficult to adapt to environmental conditions. [ABSTRACT FROM AUTHOR]