1. Zhang X, Cao B, Zhang X et al (2010) Progress in research on theory and technology of poplar pruning. Hebei J For Orchard Res 25(3):235–239
2. Chunsheng W, Zhigang Z, Longdun W et al (2012) Effects of pruning height on trunk borer (Arbela spp.) damage to betula alnoides. J Northwest For Univ 27(6):120–123
3. Siyi D, Jiyun S, Qingpeng Y et al (2015) Effects of thinning and pruning on soil microbial biomass carbon and soil enzyme activities in Chinese fir plantation. J Cent S Univ For Technol 35(6):75–79
4. Zhengping G, Ruizhen S (2004) Present status and prospect of gardening machines at home and abroad. For Mach Woodwork Equip 32(2):4–7
5. Qiming J, Xiujuan M, Dahai Z (2001) Discussion on the mechanization of pruning tall trees in cities. J Liaoning For Sci Technol 3:43–44