The area around Shenlongjia is a main flue-cured tobacco(FCT) production area, and the FCT leaves ofJinshengnong produced exhibit a character offaint scent,sweet and refined.However,the soil and climate,the two main ecological conditions,change with the altitude hight,and lead to the difference of the production and the quality of tobacco.Investigating the agricultural techniques of high,stable and good quality of tobacco under different ecological conditions is of great importace for manifestating ...