1.
Gilman, E. F., Paz, M., & Harchick, C. (2010). Root ball shaving improves root systems on seven tree species in containers.Journal of Environmental Horticulture,28(1), 13-18.
https://meridian.allenpress.com/jeh/article/28/1/13/80271/Root-Ball-Shaving-Improves-Root-Systems-on-Seven
2.
..
Silver fir and Douglas fir are more tolerant to extreme droughts than Norway spruce in south-western Germany
https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.13774
