1. Baker, J.B., Blackmon, B.G. 1977. Biomass and nutrient accumulation in a cottonwood plantation—the first growing season. Soil Sci. Soc. Am. Jour.,41: 632–636.
2. Fang Shengzuo, Lu Shixing, Xu Xizeng,et al. 1997. A case study on agroforestry management systems: effects of new poplar-crop interplanting patterns on biomass productivity, crop quality and economic benefits. Pp. 71–78 in: Volume 1. Forest and tree resources”, Proceedings of the XI World Forestry Congress, Antalya, Turkey 13–22 October 1997.
3. Fang Shengzuo, Xu Xizeng, San Xinshou,et al. 1996. The biomass productivity and wood quality of eastern cottonwood in minirotation management systems. Scientia Silvae Sinicae,32(4): 334–341.
4. Fang Shengzuo, Cao Fuliang, Zhu Yijun. 1993. The present situation and prospect of short-rotation management system in poplars. Journal of Nanjing Forestry University,17(add.): 50–55
5. Forestry Series;FAO,1979