In order to determine the suitable harvest maturity of upper leaves of rice stubble flue-cured tobacco, a random block field experiment with two factors(harvesting time and leaf position)was conducted using Yunyan 87 as materials in Jianghua, Hunan Province. The physical properties of flue-cured tobacco leaves with different harvest time and leaf position were compared, and the partial Eta;value was used to analyze the effects of harvesting time, leaf position and their interaction on the physical properties of the upper tobacco leaves. The results showed that with the delay of the harvesting ...