Articles

A METHOD OF BULB YIELD PREDICTION IN TULIP

Article number
673_105
Pages
745 – 749
Language
English
Abstract
The bulb yield of tulips in Toyama, Japan, has been fluctuating, especially since 1970. Effects of the temperature and sunshine conditions on bulb yield were investigated and the correlation between bulb yield (as the number of marketable bulbs per 10 a (= 1,000 m2)) and these two meteorological factors were statistically analyzed.
The bulb yield was deeply affected by the temperature from May 1 to 20 and decreased with increasing temperature for this period.
The growth rate reached the largest increase in the middle of May and the bulb yield was also affected by the sunshine for this period.
By applying multiple regression analysis, it was possible to predict closely the number of marketable bulbs with two meteorological factors, the daily minimum temperature and hours of sunshine.

Publication
Authors
M. Amano, M. Kanamori, F. Imai
Keywords
Toyama, marketable bulbs, multiple regression, meteorological factors
Full text
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