Correction to: Plant Soil (2018) 428, 453–467

https://doi.org/10.1007/s11104-018-3689-3

The published online article unfortunately has an error in equation (2). The corrected form for the equation (2) is:

$$ compactness=\frac{A^{1.5}}{V} $$

We are sorry for this inconvenience.