Methods
The development of the splitting test, based on the pairing test
\cite{Chauhan2010}, has resulted in a simple and quick method of
growth-strain measurement which can be used on small stems. The test
relies on the release of stored strain energy in a single plane via
cutting through the pith as can be seen in Figure \ref{202850} \citet{Chauhan2010}
derived Equation \ref{eq:st_japan} to estimate the deflection given growth-strain from
the sample geometry.