Zvanskii(5)和Zvanskii及Spilevskii(6)1931年,1933年報告在明斯克(Minsk)用矮芸苔(dwarf winter rape)做春化試驗。三月間他們把發芽三天的種子放在雪里。八天之后放到地窖里去。三十二天之後播種。實驗的結果是:在同年的六月初出現花枝(flower bearing stem)。七月到八月間開花。矮芸苔是二年生的植物,經過了春化處理之後,就能在當年開花結實。Chesnokov(3) Zvanskii (5) and Zvanskii and Spilevskii (6) In 1931, the 1933 report of the vernalization of dwarf winter rape in Minsk. In March they put the seeds for three days in the snow. Put it in the cellar eight days later Thirty-two days after planting. The result of the experiment was that flower bearing stem appeared in early June of the same year. Flowering from July to August. Brassica napus is a biennial plant that, after vernalization, will blossom in the year. Chesnokov (3)