Variation in the yield and essential oil of four chamomile varieties grown in Finland in 1985—1988
1991
B. Galambosi | ZS. Szebeni-Galambosi | M. Repcak | P. Cernaj
Four chamomile (Matricaria recutita L.) varieties were grown at Puumala, Finland (61°40' N, 28°15' E) in 1985—1989 from spring sowings on stony till soil, pH 5.8. The weather conditions in the experimental years were very different. For instance between 1987 and 1988 there was a difference of 5,3°C in the mean temperature of the growing periods (May- September). The four-year average of the fresh flower yield was 0.4 (0.1 —0.7) kg/m2. The yields varied greatly depending on the number of harvests, which depended on the weather conditions. One harvest could be obtained in 1986 and 1987, two in 1985 and three in 1988. In spite of the different weather conditions there were no differences in the content and composition of the essential oil distilled from the dry flowers.
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