5Wang R-X(王瑞新). Tobacco Chemistry (烟草化学). Beijing: China Agriculture Press, 2003.
6Ji H-X(蓟红霞). Effects of Soil Conditions on the Growth, Nutrients Accumulation and Quality of flue-cured Tobacco. MS Thesis of Chinese Academy of Agricultural Sciences, 2006.
7Wang L-Y(汪禄祥). The oxidation-reduction status in tobacco-grown soils in Yunnan Province and tobacco nutrition. MS Thesis of Southwest Agricultural University, 2001.
8Zhang F-R(张凤荣). Soil Geography (土壤地理学). Beijing: China Agriculture Press, 2002.
9Su D-C(苏德成). Chinese Tobacco Cultivation (中国烟草栽培学). Shanghai: Shanghai Scientific and Technical Publishers, 2005. pp 92–108.
10Shi H-Z(史宏志), Han J-F(韩锦峰). The discussion of several questions on carbon and nitrogenous metabolism. 烟草科技, 1998, (2): 11–16.
