The effect of cultivar and year on yield and quality components in soybean

This paper presents the results of a two-year trial of yield, protein and oil content NS soybean cultivars of 0 and I maturity group. Average yield for all tested cultivars was 3,657 kg/ha. Significantly higher yield was recorded in 2010 as compared to the 2009. Soybean cultivars Sava and Valjevka had the highest yield per unit area as compared to other tested cultivars. The protein content of all soybean cultivars was 38.04% on average. The 2010 protein content was significantly higher than the 2009. Cultivar Proteinka had significantly higher two-year average protein content (39.29%) as compared to the tested cultivars. Average oil content for all tested cultivars was 20.55%. Cultivars Valjevka and Sava had the highest average oil content, 20.88% and 20.87% respectively. The 2009 oil content was significantly higher than the 2010. Cultivar Sava had the highest protein and oil yield (1,445 kg/ha and 789 kg/ha respectively) as compared to other tested cultivars. There were statistically significant differences in yields, and protein and oil content and yield depending on cultivars and testing year. Environmental factors influenced the correlation between yield and protein oil and content.