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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?

Text Solution

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Winter variety of wheat needs low temperature treatment for flowering. It is due to vernalisation.
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Winter varieties of annual plants are planted in autumn, they germinate, and over winter come out as small seedlings, resume growth in spring and are harvested around mid-summer.

Name any two food plants which have winter and spring varieties.

Knowledge Check

  • Assertion :- Winter varieties of wheat & rye are planted in autumn not in spring. Reason:- If winter varieties planted in spring normally they fail to flower or produce mature grain within a span of flowering season.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • Fill in the blanks: 1. Wheat, barley and rye have two kinds of varieties : winter and spring varieties. The spring variety is normally and produce grain before he end of growing season. 2. Winter varieties , however, if planted in ………b…… would normally fail to flower or produce mature grain within a span of the flowering season. 3. Hence winter varieties are panted in ......c.......They germinate, and over.......d.......come out as small seedlings resume growth in the ......e.......and are harvested usually around mid - summer.

    A
    a-spring , b - winter , c - spring , d- winter , e - spring
    B
    a - winter , b - spring , c- winter , d- spring , e - winter
    C
    a - spring , b- spring , c- autumn , d- winter , e- spring
    D
    a -spring , b- winter , e- autumn , d - spring , e- winter

  • Fill in the blanks: (1) Wheat, barley end rye have two kinds of varieties: wmter and spring varieties. The ‘spring’ variety are normally plented in ....a.... and come to flower and produce gram before the end of growing season. (2) 'Winter varieties, however if planned in ..b... would normally fail to flower or produce mature grain within a span of flowering season. (3) hence ‘winter’ varieties are planted in ..c.... . They germinate, and over ........d come out as harvested usually around mid-summer.

    A
    a-spring, b-winter, c-spring, d-winter, espring
    B
    a-winter, b-spring, c-winter, d-spring, ewinter
    C
    a--spring, b-spn'ng, c-autumn, d-winter, espring
    D
    a-spring, b-winter, c-autumn, d-spring, e-

    • Similar Questions

    Explore conceptually related problems

    It is known that some varieties of wheat are sown in autumn but are harvested around next mid summer ltbvrgt A.what could be the probable reason for this ? B. what term is used for this promotion of lowering under low temperature? C. which palnt hormone can replace the cold treatment?

    Flowers have been growing around the world for a very long time. They thrive from the Arctic to the tropical jungles of Asia. Prehistoric people picked them not only for their beauty, but for medicinal purposes. They then learnt to grow them from seeds, and these became the first cultivated flowers. By cultivating seeds, people were able to grow flowers wherever they wanted. Gardens began to flourish with the prettiest, sweetest-smelling flowers. By 3000 BC, Egypt and other Middle Eastern nations were growing a range of garden flowers including jasmine, lilies and poppies in all their colours and varieties. Flowers were also used by the Egyptians to make perfume. Today, there is a wide variety of cultivated flowers all over the world. Primrose is the common name for a group of plants which flower in the spring. The cultivated primrose is one of the favourite ornamental garden flowers. They come from wild primrose plants which still grow in woods and by roadsides in Europe. Unfortunately, some other types of flowers are becoming extinct because the land they are planted on is being cleared and used to build farms, towns or cities. Many countries have annual flower shows. The Chelsea Flower Show in London is one of the most famous. Gardeners from around the world are invited to display miniature gardens and their best flowers at this well-known international exhibition. It occupies a vast area of land and is an event that attracts large crowds each year. Tourists come from all over for this celebration of spring. It is even attended by members of the British royal family. Flowers grow and thrive in:

    Flowers have been growing around the world for a very long time. They thrive from the Arctic to the tropical jungles of Asia. Prehistoric people picked them not only for their beauty, but for medicinal purposes. They then learnt to grow them from seeds, and these became the first cultivated flowers. By cultivating seeds, people were able to grow flowers wherever they wanted. Gardens began to flourish with the prettiest, sweetest-smelling flowers. By 3000 BC, Egypt and other Middle Eastern nations were growing a range of garden flowers including jasmine, lilies and poppies in all their colours and varieties. Flowers were also used by the Egyptians to make perfume. Today, there is a wide variety of cultivated flowers all over the world. Primrose is the common name for a group of plants which flower in the spring. The cultivated primrose is one of the favourite ornamental garden flowers. They come from wild primrose plants which still grow in woods and by roadsides in Europe. Unfortunately, some other types of flowers are becoming extinct because the land they are planted on is being cleared and used to build farms, towns or cities. Many countries have annual flower shows. The Chelsea Flower Show in London is one of the most famous. Gardeners from around the world are invited to display miniature gardens and their best flowers at this well-known international exhibition. It occupies a vast area of land and is an event that attracts large crowds each year. Tourists come from all over for this celebration of spring. It is even attended by members of the British royal family. Prehistoric people used flowers as a:

    Select the incorrect expression with respect to vernalisation I) Winter variety of barley if planted in spring fail to flower in a flowering season II) Biennials like sugar beet, cabbage, carrot are monocarpic plants III) Speeding up ability to flower by low temperature treatment IV) Winter variety of wheat is harvested during winter season

    Assertion (A): The Green Revolution in the late 1980s introduced the Indian farmer to cultivation of wheat and rice using high yielding varieties (HYVs) of seeds. Reason (R): Compared to the traditional seeds, the HYV seeds promised to produce much greater amounts of grain on a single plant.

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