Measurement of Bienniality in Coconut
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2007-02
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Abstract
Based on the rank correlation coefficients for yields obtained in consecutive years and adjacent years, an index has been worked out to measure the biecniality for coconut yields. It was found to be significant in W. C. Tall population of different age groups growing under rainfed conditions. In un irrigated plot, this index came down from 0.99 during pre-irrigation period (1961-72) to 0.57 in the irrigation period (1975-86), while it was devoid of any marked changes for the corresponding periods in the unirrigated plot, where the palms were of comparable age. Changes in the bienniality has been studied in different age groups and under different management practices also. In low yielding palms biennial.rhythm was found to be less.
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J.Plantn.Crops 1991 Suppl. v-18 p-364-368