Certain trees and shrubs may more easily be propagated from cuttings than from seed. Others may be regenerated by root or stem layering. It is well known that new trees of willow, poplar or sycamore may readily be produced by cuttings separated from the parent tree and planted in soil or sand under favorable conditions of temperature and moisture.
Proceedings of the Iowa Academy of Science
©1929 Iowa Academy of Science, Inc.
Hutchings, G. C. and Larsen, J. A.
"Stimulation of Root Growth on Cuttings from Hardwood Forest Trees,"
Proceedings of the Iowa Academy of Science, 36(1), 191-200.
Available at: https://scholarworks.uni.edu/pias/vol36/iss1/30