Q. No.Julius Von Sachs
Which of the following is not related?
1. A prominent German Botanist
2. In 1860, he demonstrated for the first time that plants could be grown to maturity in a defined nutrient solution in complete absence of soil
3. The technique, Hydroponics
4. Categorized the essential and non Essential mineral nutrition.
Plants can be grown in
1. soil with essential nutrients.
2. water with essential nutrients.
3. either water or soil with essential nutrients.
4. water or soil without essential nutrients.
The criteria for essentiality of an element for a plant include all except:
1. It must be absolutely necessary for supporting normal growth and reproduction
2. The requirement must be specific and not replaceable by another element
3. It must be directly involved in the metabolism of the plant.
4. They must be present in the plants in a concentration in excess of 10 mmole/Kg of dry matter.
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
Hydroponics cannot be used in the commercial production of vegetables such as
(1) Tomato
(2) Seedless cucumber
(3) Lettuce
(4) Pomegranate
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
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 mg/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
In the given diagram of a typical set up for nutrient solution culture, the purpose of X is:
| 1. Addition of water 2. Addition of nutrients 3. Removal of wastes 4. Aeration |
 |
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
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