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प्रश्न
How are the terms ‘critical concentration’ and ‘deficient’ different from each other in terms of concentration of an essential element in plants? How will you find the values of ‘critical concentration’ and ‘deficient’ for minerals – Fe and Zn?
उत्तर
The concentration below which plant growth is retarded is critical for an essential element. Any concentration below the critical concentration is called a deficiency.
|
Element |
Critical concentration |
Deficient |
|
Zn |
0.5 – 1% |
< 0.5% |
|
Fe |
3.5 – 5% |
< 3.5% |
APPEARS IN
संबंधित प्रश्न
Name at least five different deficiency symptoms in plants. Describe them and correlate them with the concerned mineral deficiency.
If a plant shows a symptom which could develop due to deficiency of more than one nutrient, how would you find out experimentally, the real deficient mineral element?
Why is that in certain plants deficiency symptoms appear first in younger parts of the plant while in others they do so in mature organs?
Which one of the following statements can best explain the term critical concentration of an essential element?
Deficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental deficiency would show such symptoms?
Carnivorous plants exhibit nutritional adaptation. Citing an example explain this fact.
It is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves.
- Does it indicate that the element is actively mobilized or relatively immobile?
- Name two elements which are highly mobile and two which are relatively immobile.
- How is the aspect of mobility of elements important to horticulture and agriculture?
