- 1(current)
Q. No.The deficiency symptoms of which of the following tends to first appear in young tissues?
| 1. Nitrogen | 2. Potassium |
| 3. Calcium | 4. Magnesium |
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Any mineral ion concentration is considered toxic to plants if it reduces the dry weight of tissues by:
| 1. 5 % | 2. 10 % |
| 3. 25 % | 4. 50 % |
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Symptoms of excess of manganese may actually be the deficiency symptoms of all the following except:
| 1. Iron | 2. Magnesium |
| 3. Calcium | 4. Sulfur |
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Which one of the following statements can best explain the term critical concentration of an essential element?
1. Essential element concentration below which plant growth is retarded.
2. Essential element concentration below which plant growth becomes stunted.
3. Essential element concentration below which plant remains in the vegetative phase.
4. None of the above
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A symptom common to the deficiency of Ca, Mg, Cu and K in plants is:
1. Chlorosis
2. Inhibition of cell division
3. Necrosis
4. Delay in flowering
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| I: | Deficiency symptoms of nitrogen, potassium and magnesium are visible first in the senescent leaves. |
| II: | These elements are a part of the structural component of the cell and hence are not easily released. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct and II is incorrect |
| 4. | I is incorrect and II is correct |
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Statement I: Excess of manganese in higher plants may induce deficiency of iron.
Statement II: Manganese inhibits translocation of iron at apex.
1. Both Statement I and Statement II are correct and Statement II explains Statement I
2. Both Statement I and Statement II are correct but Statement II does not explain Statement I
3. Statement I is correct and Statement II is incorrect
4. Statement I is incorrect and Statement II is correct
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- 1(current)
Q. No.
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