The contributions to the amelioration of the industrial quality of Virginia type tobacco cultivated on low productive soils.

For the program of improving Virginia tobacco of interest there are the lines and soils achieving yellow-orange colour leaves (with a sweet taste), uniform yellow colour, whose dry tobacco production is over 80% Superior + I classes. The industrial quality of tobacco is determined both by the characteristics of green leaves at the moment of harvest and the physical characteristics of the dry leaf. The results of the researches made for the industrial quality of dry tobacco, with a mean of three years, reveal a great variability within the studied biologic material.The analysis of the data reveals that 18 sorts have given good results, with over 80 % of production at Superior + I classes, which can be genetic sources for improving the quality of unfermented tobacco.