Effect of different planting dates on yield and yield components promising lines vetch in Shushtar

Effects of planting date on performance and parts of performance of promising (hopeful) lines of an experiment in the shape of shattered plots in the form of blocks of complete random with 4 repetitions in a farm in Shushtar was implemented in summer in agronomical year of 2007-2008.Experimental treatments consisted of three dates of planting dates-9th, 19th 29th of Tir and the lines under investigation included VC6153B-20G, VC6372 and VC6173A. Moreover, Parto cultivars were taken as the witness. The tissue of soil was loam clay. the results of this experiment pointed out that the history effect of planting date and variety was significant whit the level of one percent. Like wise. The greatest grain performance to the amount of 3575 kg.ha was obtained through both planting date of Tir 29th and the variety of VC6153B20G.The It seems that among the performance parts it is the number of case in the bush and grain in the case that has a greater role in enhancing the performance in contrast to other performance parts.