Winter Wheat (Triticumaestivum L.) Yield and Weeds Height as influenced by Tillage Systems and Weed Control Methods

Conventional tillage in agriculture is one of the high-energy consumption operations accounted for approximately 50% of total energy consumption. Field studies were conducted to evaluate the effects of the tillage systems and weed control methods on winter wheat ( Triticumaestivum var. Shiraz) yield and weed whole flowered plant heights in agriculture faculty of Shiraz University on 2011-2012. The experimental design was a split-plot with three replications. The main factor was tillage systems including no tillage (NT), reduced tillage (RT)(tillage using compound), and conventional tillage (CT) (use of Suki plows, disking, and leveling up), and the sub-factor was various methods of weed control including hand weeding during the crop plant growth (HW), use of herbicides (H), and the case (without any weed control) (C).Results showed that the highest grain yield of wheat was belonged to the conventional tillage, reduced tillage, and no tillage treatments, respectively. There were no significant differences between weed control methods (p<0.05) in regard to the wheat grain yield. The highest whole flowered plant height sat crop heading and tillering stages were observed in no-tillage treatment. At crop tillering stage, there were no significant differences between weed whole flowered plant heights in all weed control treatments. According to the results of the study, using conventional tillage system together with herbicide application can be suggested for gaining of high winter wheat yield under Bajgah climatic condition.