This study was been conducted to determine chemical characteristics of soils in the major districts cultivating flue-cured tobacco plant. Also native soil productivities were measured by means of bioassay planting tobacco plant without fertilizer at 87 selected lolls through pot and field experiments. Inorganic nutrient in soils affecting the dry weight of tobacco leaves cultivated in the field were investigated. The results obtained are summarized as follows; 1. Among soil chemical characteristics, pH, NO3-N, NH4-N , P2O5, and Mg Influenced significantly the dry weight of tobacco loaves In pot experiment, whole In the field experiments, pH, NO3-N, NO3-N+NH4-N, and Ca had influence. 2. Correlation coefficients between soil chemical characteristics and dry weight of tobacco leaves were higher in pot experiment than field. The results revealed that soil morphological characteristics might more close influence on dry weight of tobacco leaves than chemical characteristics. 3. For prediction of dry weight (Productivity) of tobacco leaves without fertilizer multiple regression analysis were introduced using troll chemical characteristics. A combination of pH, NO3-N, and Ca was very reliable for prediction of productivity as equation. y=5.02+18.07xl +2.61x2 +5.36x3 R=0.444** Where x1:pH, x2:NO3-N, x3:Ca