A Study of the effect of plant arrangement on the yield and its components of potato cultivar (Lady Rosita and Agria) in Arak region

To study of plant arrangement effect on yield and its components in two cultivars، Agria and Lady Rosita، an experiment was done in Arak Islamic Azad University in 2007. In this study factorial experimented design based on RCBD was used. Factors were considered as cultivation method in 3 levels (one rowed with 60 cm width furrow، two rowed with 120 cm with furrow and one rowed with 75 cm width furrow، as ordinary cultivation) and two cultivars of potato (Agria and Lady Rosita) with 3 replications. The result showed that the arrangement of cultivation and cultivar have significant effect on the small glands seed glands average weight and the small glands numbers and edible glands numbers and marketable yield and total yield. The cultivar and arrangement effect on components yield and total yield and marketable yield in surface unit was signification، but in single bush yield the distance between rows that is، Lady Rosita cultivar in 60 cm one rowed arrangement with density of 6. 6 bushes in m2، produced that highest amount of edible glands and seed glands، In Agria cultivar، offer the decreasing distance between rows and increasing that density from 5. 3 to 6. 6 bush/m2، the highest amount of small glands with the lowest weight in bush was produced، but there was no significant difference in single bush yield. Due to the results of this study، cultivar Lady Rosita with arrangement of 60 cm one rowed (by 6. 6 bushes /m2) is suggested for Arak region.