Studies on the cultivation of spring wheat [Triticum aestivum] seeded in early winter in Hokkaido [Japan]
2006
Sato, M.(Hokkaido. Central Agricultural Experiment Station, Naganuma (Japan))
One of the methods of cultivation of spring wheat (Triticum aestivum L. ssp. vulgare (Vill.)Thell.) is to sow the seeds in early winter just before snow covers the ground, and let seeds germinate under the snow and regrow after snow melts. The record for this method of spring wheat cultivation dates back to 1930's, though it was not practiced in general. Troubled by the low yields of the spring-sown wheat and due to the soil-borne diseases of continuous cultivation of winter wheat, sowing of spring wheat in early winter was reattempted by the agricultural extension advisers in 1980's. I analyzed the problems associated with early winter-sown spring wheat so as to make this cultivation method a practicable technology. l examined the effect of sowing dates and nitrogen application on yield and the quality of the produce of conventional spring wheat varieties. I found that the survival of the wheat crop during winter depended on the growth habit of the variety and the soil type. I selected lines that could survive during winter so as to get stable high yield of good quality from early winter-sown spring crop.
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