IMPACTS ON WHEAT YIELD AND QUALITY OF PRODUCTION TECHNIQUES AND ENVIRONMENTAL CONDITIONS

Grain yield and quality of bread wheat in dry farming can be significantly affected by environmental conditions and fertilizer applications. This study was conducted to determine the effect of environmental conditions, nitrogen (N) sources and topdressed times on the some yield and quality traits of bread wheat (Triticum aestivum L.) in calcareous soils over two years, 2007/08 and 2008/09, in Central Anatolia environmental conditions. Three N sources, urea (46% N), ammonium nitrate (33% N) and ammonium sulphate (21% N), were applied as hand broadcast on the soil surface during spring at four different times (15 December, 15 February, 15 April and control). As the base fertilizer, 200 kg ha-1 manure (13% N, 24% P2O5, 12% K2O ) was used during sowing and 74 kg ha-1 nitrogen were applied as topdressed to all plots. Traits investigated were grain yield per spike, test weight, wet gluten and gluten index. Effects of environmental conditions, N source and timing on yield and quality traits differed significantly. Grain yield (p