Effects of Different Row Spacing and Seeding Rate on Grain Yield and Yield Components in Some Bread Wheat Cultivars (Triticum aestivum L.)

This research was carried out in experimental field of Field Crops Department of Agricultural Faculty of Namik Kemal University in randomized split split blocks design with three replications for two years (2003/2004 and 2004/2005 growing seasons). The objective of this study was to determine the effects of some different row spacing (17, 34, 51 and 68 cm) and seeding rates on grain yield and yield components of three bread wheat cultivars (Pehlivan, Flamura-85 and Saraybosna) commonly grown in Trakya region. Based on the results of this study, some yield characters of bread wheat cultivars such as grain yield per decare, number of spikes per square meter and harvest index have been negatively affected by increasing row spacing. However, effects of row spacing on grain weight per spike varied from year to year, On the other hand, some yield characters of wheat cultivars such as grain yield per decare, number of spikes per square meter, grain weight per spike and harvest index have been positively affected by increasing of seeding rates depend on different row spacing