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Some varieties of wheat are known as spr...

Some varieties of wheat are known as spring wheat while others are called winter wheat. Former variety is sown and planted in spring and is harvested by the end of the same season. Hower winter varietis if planted in spring fail to flower or produce mature grains within a span of a slowering season . Explain, why?

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Winter variety of wheat needs low temperature treatment for flowering. It is due to vernalisation.
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