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AGR (Absolute Growth Rate): the total growth (increase in size, weight or area) of a plant or organ per unit time, e.g. cm2 of leaf area per day.

RGR (Relative Growth Rate): the growth of a plant per unit time expressed per unit initial size, i.e. growth per unit time as a fraction (percentage) of the initial parameter: \(\text{RGR} = \dfrac{\text{growth in given time}}{\text{initial size}}\times 100\).

Two leaves may show the same AGR (e.g. both increase by 5 cm2) but the smaller leaf has a higher RGR.

Doubtly AI · 29 Oct 2026 AI-verified · Nov 2026 Report
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