Layering is a simple form of propagation which consists of bending a low branch or shoot down to soil level, wounding the shoot and then covering this portion with soil to encourage it to root.

This is air layering propagation at work, where the mature tree or plant is cloned from a stem that is still attached to it.

The dataset can be used for testing methods of uncertainty propagation and global sensitivity analysis ... per1 ~ Uniform[1, 15] hydraulic conductivity layer 1 per2 ~ Uniform[5, 20] hydraulic ...