SUMMARY
Tobacco is one of the important agricultural and industrial products which plays a crucial role in economics and income of the producing countries and tobacco’s leaves are actually used commercially. In this study, the effects of two tobacco varieties K326 and 347 in three plant spacing of 30, 40, and 50 cm (with density of 33333, 25000 and 20000 plants/ha) on physical properties and weight of tobacco leaves are discussed. The results of variance analysis showed that the ¬¬¬effects of variety and plant spacing on leaf surface in 5% level were significant. Interaction effect of these two factors wasn’t significant. Also results showed that independent and interaction effects of plant spacing and different varieties of tobacco on leaf weight were significant in %1 level. Overall, the mean comparison analysis indicated that weight of tobacco leaf was increased with increasing of plant spacing and this incensement in variety of 347 was more than that of K326 variety. The independent and interaction effects of plant spacing and different tobacco variety on yield were significant in %1 level. The highest and lowest amounts of tobacco yield were obtained for 347 variety in plant spacing of 30 cm and k326 variety in plant spacing of 50 cm, respectively. Generally, according to results the region conditions and economical values, tobacco variety 347 is recommended.