Trust me !! This is unbelievable. Please read through this abstract and you will agree with me :).
Researchers from the Department of Plant Science in California have developed an equation for estimating Arundo donax shoot dry weight from shoot length. The equation, shoot dry weight (g) = 14.254 (standard error = ±0.275) × shoot height2 (m), was as effective at explaining a high proportion of total variation in shoot dry weight (R2 = 0.90) as more complicated equations containing additional morphometric parameters.
They are tested against two independent datasets, the equation provided accurate estimates of dry weight for shoots ranging from 0.3 to 7.06 m height (dataset 1, P < 0.0001, R2 = 0.87, N = 29; dataset 2, P < 0.0001, R2 = 0.82, N = 192). The equation provides above ground biomass estimates from stem counts and heights more rapidly than harvest methods.
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