Estimation of Leaf Area in Greengram by Non‐destructive Linear Measurements

Abstract

The leaf area by non‐destructive linear measurements have been made in eight cultivars of greengram. The regression equation was Y = 1.58 + 1.79 (X), r = 0.9988** while X = L × W. L and W are the maximum length and width of the terminal leaflet of a trifoliate leaf respectively. Y = leaf area of a trifoliate leaf. This study indicated that this equation can be used for a measuring of the leaf area in situ irrespective of the position of the leaves and variety in greengram. Zusammenfassung Abschätzung der Blattfläche von Mung‐Bohne mit Hilfe einer nichtdestruktiven linearen Messung Die Untersuchungen zu einer nichtdestruktiven linearen Messung wurden bei acht Sorten der Mung‐Bohne durchgeführt. Die Regressionsgleichung war Y = 1,58 + 1,79 (X), r = 0,9988**, während ×= L × W war. L und W sind die Maximumlängen und Breiten des terminalen Blattes eines dreifach gefiederten Blattes. Y = Blattfläche eines dreifach gefiederten Blattes. Die Untersuchung zeigt, daß die Gleichung für die Messung der Blattfläche in situ bei Mungo‐Bohnen verwendet werden kann, unabhängig von der Position des Blattes und der Sorte.

Estimating leaf area in mungbean (Vigna radiata)

“…Variations in leaf shape index and in the LA: LW ratio imply that mungbean leaf area cannot be estimated by some linear function of LW as suggested by Yeboah et al (1983). Manian et al (1987) found no significant difference in the ratios among their varieties that allowed them to generate a unified linear equation for estimating trifoliate leaf area in P. aureus.…”

“…Similar methods were also reported for Vicia faba (Ricciardi et al 1987) and guava (Kobayashi 1988). Manian et al (1987) reported linear measurement of length and maximum width of the terminal leaf in the trifoliate leaves of green gram (Phaseolus aureus). Although they used morphologically different varieties of P. aureus, Manian et al (1987) estimated the whole trifoliate leaf area with a generalized equation for all the eight varieties they studied.…”

“…Manian et al (1987) reported linear measurement of length and maximum width of the terminal leaf in the trifoliate leaves of green gram (Phaseolus aureus). Although they used morphologically different varieties of P. aureus, Manian et al (1987) estimated the whole trifoliate leaf area with a generalized equation for all the eight varieties they studied. Usually varieties differ widely in respect of shape and size of leaves (Williams 1954).…”