INFLUENCE OF INTER-ROW SPACING AND CULTIVAR ON THE YIELD COMPONENTS OF SOYBEAN (Glycine Max. [L.] Merr.)

Influence of inter-row spacing on a productivity of soybean yield was studied on low carbonate chernozem soil in Serbia. The number of pods per plant during two-year research for row spacing and cultivar was averagely 31.7. On average, the highest number of pods per plant in two-year research was at the smallest spacing (34.1) for the cultivars included in studies. Compared to standard planting (45 cm row spacing), it was higher by 6.2%, and by 15% as compared to the largest spacing (70 cm row spacing). Mean squares from the analysis of variance of pods per plant was statistically significant effect from row spacing, cultivars and their interaction in 2003 and was statistically significant effect from row spacing and cultivars in 2004. The highest 1,000-grain weight (175.1 g) was achieved at the smallest inter-row spacing. It decreased at bigger row spacing for mostly 4.5%. The highest value of 1,000-grain weight (193.5 g) was present in cultivar Bosa, and the lowest (141.3 g) in cultivar Dragana. Similar to grain weight per plant, the largest weight of 1,000 grains, on average for the cultivars included in the research, was achieved by sowing at 20 cm row spacing and was 175.1 g. With increase of row spacing, 1,000-grain weight decreased by 2.8 g to 7.9 g. A similar decreasing trend can be observed at the varieties respectively.