Surveying the yield and the yield components of four biotypes of dry farm wheat in three different cultivation samples in Ilam region

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In order to study the effect of different densities of bush on the yield and yield components of four species of bread wheat, an experiment was conducted in culture and industry farm of Misagh-E-Sabz in Abdanan town, Ilam in 2014-2015cropping years. This experiment was studied and compared as completely randomized blocks in split plots in two factors (cultivar as the main factor and planting lines space as the sub factor) and with four replications. The main treatments included the four cultivar, namely Zagros, Line B, Kouhdasht, and Karaj. Sub treatments included three samples of planting with row intervals equivalent 15, 20, and 25. All the mentioned samples were examined with density of 300 seeds in a square meter. The results showed that the differences between the lengths of internode, the number of seeds in cluster and dry material in the cluster emergence, was significant at the level of %.1. In this experiment, Kouhdasht and Zagros had the  highest and lowest seed yield, respectively. The highest spike in square meter and number of seed was belonged to Kouhdashtcultivat, and also the highest weight of thousand seeds was in Karaj type. In every four types, with increasing the density of the bush in level unit, number of clusters in a square meter was the only component of yield components increased

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