1. This experiment was carried out in order to harvest strawberries at the Christmas and New year season.
Strawberry seedling were taken up to the cold high land, Sin-bul mountain farm(800m above sea level), and the flower bud differentiation was hastened by conduting both low temperature and short day treatment.
2. Varieties observed were Hong-hak, Bog-u, Hang-ok and Danner.
Treatment plots were divided into short day treatment plots with a sheet of Straw mat, Silver polydo short day treatment plots, the plots shaded from the sun all day long by a marsh-reed mat and control.
and this experiment was designed by the Split plot design of three replications.
3. Observation of the flower bud differentiation: The result of the investigation conducted on September 25th was that Hong-hak showed 80%, Bog-a 60%, Danner 40% and Hang-ok 20% in their ratio of the flower bud differentiation of the Silverpolydo Blots which was the best result.
4. Observation of flowering period:
On November 20th, the final period when we can harvest strawberries at the Christmas and New year season, Hong-hak bloomed 15 flowers per a plant, Bog-u and Danner 8.5 and Hang-ok 5.6, Among the treatment plots, Silver polydo and Straw mat plots had many flowers of them.
5. Observation of yields:
The yields of the most abundant plots from November 15th to February 10th indicated that Hong-hak produced 12 berries per a plant, Bog-u 7.6 Danner 6, Hang-ok 4.6, Among the treatment plots, Silver polydo plots were the most abundant.
6. It was considered that this way of cultivation was profitable, for the strawberries had been sold for about 20won per a berry from about the middle of November in 1908 to 10th of February in 1969.
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