Hydroponics can be used in

(1) Identification of essential elements

(2) In discovery of deficiency symptoms of essential elements

(3) For commercial production of vegetables

(4) All of these

Subtopic:  Hydroponics & Aeroponics |
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Hydroponics cannot be used in the commercial production of vegetables such as

(1) Tomato

(2) Seedless cucumber

(3) Lettuce

(4) Pomegranate

Subtopic:  Introduction |
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Which of the following is the essential requirement of Hydroponics?

(1) Aeration to obtain the optimum growth

(2) Lage vessel

(3) Broader neck

(4) Cotton plugs for funnel adjustment

Subtopic:  Introduction |
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How many elements are found in plants?

(1) 105

(2) 35

(3) 44

(4) More than 60

Subtopic:  Classification of Nutrients |
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Which of the following statements is wrong?

(1) There are techniques that are able to detect the minerals even at a very low concentration i.e. 10 ng/mL

(2) Some plant species accumulate selenium and some others gold

(3) Some plant species nuclear test sites take up radioactive Strontium

(4) The criteria for essentiality of an element completely depends upon the amount of element

Subtopic:  Classification of Nutrients |
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Which of the following is not a criteria for the essentiality of an element?

(1) The element must be absolutely necessary for supporting normal growth and reproduction

(2) In the absence of element, the plant is not able to complete their life cycle or set the seeds

(3) The requirement of that element must be specific can be replacable by another element

(4) The element must be directly involved in metabolism

Subtopic:  Criteria for Essentiality of Elements |
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The elements are classified into Macronutrients and Micronutrients based on their

(1) Qualitative properties

(2) Structural properties

(3) Quantitative requirements

(4) Both B and C

Subtopic:  Classification of Nutrients |
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Which of the following can be a Macronutrient?

(1) N

(2) O

(3) H

(4) All of these

Subtopic:  Classification of Nutrients |
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Which of the following cannot be Macronutrient?

(1) P

(2) S

(3) K

(4) Mn

Subtopic:  Criteria for Essentiality of Elements |
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Which of the following Macronutrient is absorbed from soil as mineral nutrition?

(1) P

(2) C

(3) H

(4) O

Subtopic:  Classification of Nutrients |
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