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Mineral Nutrition Test - 47

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Mineral Nutrition Test - 47
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  • Question 1
    1 / -0
    Hydroponic requires
    Solution
    Hydroponics requires 10 times less water than normal agricultural plants that require proper methods of watering. A lot of water gets evaporated from the soil or seeps deep inside the layers. But in hydroponics water requirement is just 1/10 of water requirements of traditional agriculture.
    So the correct answer is ' 1/10 of water'.
  • Question 2
    1 / -0
    Hoagland solution is used in which of the following methods?
    Solution
    • The Hoagland solution is a nutrient solution used in hydroponics. Here the plants are submerged in a thin layer of solution. 
    • In aeroponics, the nutrient solution is sprayed as fog or mist.
    • Fogponics is a type of aeroponics in which electric fogger is used.
    So the correct answer is 'Hydroponic solutions.
  • Question 3
    1 / -0
    Which of the following are the three primary nutrients needed for plant growth?
    Solution
    There are 17 nutrients that essential for the growth of the plants. These nutrients are classified into two categories on the basis of requirement micronutrients (required in less amount) and macronutrient (required in large amount). The three primary nutrients needed for plant growth are nitrogen, phosphorous and potassium.
    So, the correct answer is option B.
  • Question 4
    1 / -0
    Which of the following is used in hydroponics?
    Solution
    Growing medium is an important component of hydroponics.
    Some most common growing mediums are :
    1. Sand peat
    2. Rockwool
    3. Gravels
    4. Perlite
    So the correct answer is 'Both A and B'.
  • Question 5
    1 / -0
    The term hydroponic was coined by
    Solution
    The term hydroponics was coined by William Frederick Gericke.
    Priestly is famous for discovering gases.
    Sachs discovered the Tay Sachs disease.
    So the correct answer is 'Gericke'.
  • Question 6
    1 / -0
    Hydroponic is a subset of what type of culture?
    Solution
    Hydroponics is a sub set of hydroculture. In this method plants are grown without soil by using nutrient solutions.
    Tissue culture is the method of growing plants from cells or tissues, derived from an organism, in an artificial medium.
    Solid medium culture involves the growth of plants or microbes on a solid support which contains the nutrients such as agar gel, etc.
    So the correct answer is 'Hydroculture'.
  • Question 7
    1 / -0
    Hydroponic is a technique of growing
    Solution
    Hydroponics is a technique of growing terrestrial plants.
    It uses a nutrient solution called Hoagland solution.
    A growing medium is used along with a thin layer of nutrient solution.
    So the correct answer is 'Terrestrial plants in water containing nutrients'.
  • Question 8
    1 / -0
    In plants, minerals
    Solution
    Minerals are very important for plants because:
    1. They help in maintaining gradients across membrane's like potassium, Sodium, etc.
    2. They influence water movement into the cell. For example Opening of stomata is caused by movement of water into guard cells due to influx of potassium.
    3. Cell shape and growth is maintained. Example Calcium, etc
    So the correct answer is 'All of the above'.
  • Question 9
    1 / -0
    The disadvantage of hydroponic method is that it is
    Solution
    Hydroponics requires less water than irrigation on agricultural lands.
    It is a quicker and a safer as well as productive method.
    The disadvantage is that it is an expensive project which requires proper conditions and large investment.
    So the correct answer 'Expensive'.
  • Question 10
    1 / -0
    'Die back' of citrus and 'reclamation' of legumes and cereals is due to deficiency of
    Solution
    Copper is an important micronutrient which involves in the lignification of plant and also provides standibility to the plants. It is the main component of protein and enzyme that regulates the metabolic activities ion plants. Its deficiency can reduce the lignification which turns leaves of citrus plant wilt, brown colour and even dies. This condition is called as die back of citrus. It also stops the seed maturity and causes chlorosis. This condition is called as reclamation of legumes and cereals.
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