Liu, Z. (1996) Microelements in Soils of China. Jiangsu Science and Technology Press, Nanjing.
 Xing, G.X. and Zhu, J.G. (2003) Chemistry of Soil Micro & Rare-earth Elements. Science Press, Beijing.
 Wang, D.S., Liu, G.S. and Li, Z.H. (2002) Tobacco Cultivation. China Science and Technology Press, Hefei.
 Li, M.D., Xiao, H.Q., Yu, C.X., et al. (2005) Status of Medium and Minor Elements in Hunan Province and Effectiveness of Fertilizer Application in Tobacco Plants. Chinese Tobacco Science, No. 1, 25-27.
 Liu, G.S., Wang, P., Duan, S.J., et al. (2009) Effect of Adding Trace Element Fertilizer or Biofertilizer on the Chemical Quality of Flue-Cured Tobacco. Journal of Henan Agricultural University, 43, 241-246.
 Xu, X.Q., Xu, A.F. and Wang, W.G. (2012) Effects of Micro Elements of Tobacco Leaves on the Aroma Quality of Flue-Cured Tobacco. Guangdong Agricultural Sciences, No. 3, 30-34.
 Song, M. and Zhao, W.P. (2012) Effects of Several Kinds of Trace Element Fertilizers on Yield and Quality of Flue-Cured Tobacco. Beijing Agriculture, No. 5, 92-93.
 Zeng, R., He, Z.J., Cheng, Z.M., et al. (2010) Study on Effects of Cu on Tobacco Growth and Yield. Modern Agricultural Sciences and Technology, 2010, 65-66.
 Wang, Y.Y. (2013) Distribution Characteristics of Fe, Mn, Cu, Zn Contents in Soil and Tobacco Leaves of Typical Tobacco Planting Area. Chinese Academy of Agricultural Sciences, Beijing.
 Zhao, X.B. (2013) Content Distribution and Space Variation of Trace Elements in Tobacco-Planting Soil in Changshun County of Guizhou Province. Guizhou Agricultural Sciences, 41, 68-71.
 Gu, H.S., La, H.X., Cao, T.M., et al. (2012) Spatial Variability of Microelement Content in Karst Tobacco-Growing Regions Using Geostatistics and GIS—A Case Study in Bijie of Guizhou Province. Journal of Henan Agricultural Sciences, 41, 74-78.
 Liu, C.K., Tang, S.K., Zhang, T., et al. (2012) Study on Spatial Distribution of Available Microelement in Soil in Luliang Tobacco Farming Area. Chinese Agricultural Science Bulletin, 28, 71-75.
 Li, Q., Zhou, J.H., Zhang, Y.A., et al. (2013) Spatial Variability and Influencing Factors of Available Microelements in Tobacco Growing Soils in Qujing. Tobacco Science & Technology, No. 10, 63-67, 69.
 Cui, A.H., Zhan, D.Q., Guo, L., et al. (2014) Microelement Contents in Plough Horizons of Tobacco Planting Soil in Bozhou. Soils, 46, 1164-1168.
 Ji, X.J., Shen, S.D., Xue, L., et al. (2013) Soil Taxonomy of Typical Tobacco Fields in Xuancheng of Southern Anhui. Soils, 45, 763-765.
 Anhui Bureau of Quality and Technical Supervision (2006) Technical Regulations on Normalized Transplanting of High Quality Flue-Cured Tobacco in Xuancheng.
 Lu, R.K. (1999) Methods of Soil Agricultural Chemistry Analyses. China Agriculture Press, Beijing.
 Bao, S.D. (2005) Soil Agricultural Chemistry Analyses. China Agriculture Press, Beijing.
 Hu, H.J., Wan, S.H., He, X.Y., et al. (2014) Brief Study on Influential Factors of Availability of Soil Cu, Fe, Mn and Zn. Agriculture and Technology, 34, 23-24.
 ISSAS, CTC and SQM (1993) Atlas of Flue-Cured Tobacco Nutrition and Disorder Symptoms. Jiangsu Science and Technology Press, Nanjing.
 Wang, S.J., Li, T., Zhao, D.K., et al. (2005) Study on Middle- and Microelement Contents in Soils and Tobacco Leaves in Anhui Tobacco-Planting Regions. Journal of Anhui Agricultural Sciences, 33, 2065-2066.
 Liu, C.S. and Wang, H.J. (1988) Suitable Applying Amounts for Microelements. Northern Horticulture, No. 1, 43.
 Guo, Y.M., Li, H.H., Li, S.M., et al. (2013) Correlation Analysis of Protein Content and Mineral Content in Brown Rice and Establishment of the Math Model for the NIRS Analysis. Journal of Plant Genetic Resources, 14, 173-178.