A 2-years (1989~1990) study was couducted to determine the effect of cultural factors on the chemical characteristics of flue-cured tobacco (Nicotiana tabacum L.) grown in Hunan Province. Cured samples were analysed. The results iudicated that rate of apllication had a very great iufluence on the chemical composition of the tobacco.when the optimal combination of agronomic measures which was suggested in No I Report of the present study was adopted,the suitable an...