Growth in plants is measured by

Solution (By Examveda Team)

Growth in plants is measured by Auxanometer.
An auxanometer is an apparatus for measuring the increase of growth in plants.
When the plant's height increases, the pulley rotates and the pointer moves on a circular scale to directly give the magnitude of growth.
The "rate of growth" is a derived measurement obtained by dividing the length of growth measured by the auxanometer.