DETERMINATION OF THE PERFORMANCE OF SOME SOYBEAN (Glycine Max. (L.) Merr) VARIETIES /LINES

This study was conducted to determine the performance of some soybean (Glycine max (merr) L.) varieties/lines in the 2014 and 2015 growing seasons. It was designed as a randomized block experimental design with four replications at the Kezer Campus of Siirt University. Essential factors such as yield (kg ha-1), plant height (cm), first pod height (cm), number of pods per plant (number/plant), and thousand-seed weight (g) were determined. According to the results of pooled twoyear variance analysis, line 834 produced the lowest seed yield (1798.7 kg ha-1), while variety Gapsoy 16 produced the highest seed yield (2672.1 kg ha-1). Besides variety Gapsoy 16, line 1022 (2639.2 kg ha-1) came to the forefront in terms of seed yield. Considering the first pod height, line 1022 reached the highest value in two years. The first pod height of the first year in general appeared to be higher than that of the second year. This may be associated with the timing of first irrigation. The examined characteristics varied under the influence of different climatic and soil conditions in both years. Based on the two-year average oil ratios, variety Türksoy had the highest value (17.35%). With regard to the two-year average protein ratios, line 1021 had the highest ratio (34.14%). As a result, the differences between the characteristics of lines/varieties and years were found to be statistically significant. Results of the two-year study show that soybean can be grown successfully in Siirt province if irrigated and that variety Gapsoy 16 and line 1022 give the highest yields