Deficiency of Nutrients

Q.

Write the uses and deficiency symptoms of any four macronutrients essential for plants.

Q.

Match the following deficiency symptoms with relevant essential elements:

$\begin{array}{cc}\text{Column - I}& \text{Column - II}\\ A.\text{Chlorosis}& 1.\text{N, S, Mo}\\ B.\text{Necrosis}& 2.\text{N, K, S, Mo}\\ C.\text{Inhibition of cell division}& 3.\text{Ca, Mg, Cu}\\ D.\text{Delay of flowering}& 4.\text{N, K, Mg, S, Fe, Mn, Zn, Mo}\end{array}$

1. A - 1, B - 2, C - 3, D - 4

2. A - 4, B - 3, C - 1, D - 2

3. A - 3, B - 4, C - 1, D - 2

4. A - 4, B - 3, C - 2, D - 1

Q.

Deficiency of micronutrients not only affects the growth of the plants but also its vital functions, such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements will mostly affect, both photosynthetic and mitochondrial electron transport?

1. Cu, Mn and Fe

2. Co, Ni and Mo

3. Mn, Co and Ca

4. Ca, K and Na

Q.

Match the following deficiency symptoms with relevant essential elements:

$\begin{array}{cc}\text{Column - I}& \text{Column - II}\\ A.\text{Chlorosis}& 1.\text{N, S, Mo}\\ B.\text{Necrosis}& 2.\text{N, K, S, Mo}\\ C.\text{Inhibition of cell division}& 3.\text{Ca, Mg, Cu}\\ D.\text{Delay of flowering}& 4.\text{N, K, Mg, S, Fe, Mn, Zn, Mo}\end{array}$

1. A - 1, B - 2, C - 3, D - 4

2. A - 4, B - 3, C - 1, D - 2

3. A - 3, B - 4, C - 1, D - 2

4. A - 4, B - 3, C - 2, D - 1

Q.

_______ nutrients are needed in small quantity for plants and are called as________.

Q.

The leaves turn and become yellow due to deficiency of:

1. Na

2. K

3. Ca

4. Fe

Q. Select the correct option-
Assertion: When there is a deficiency of relatively mobile elements, the deficiency symptoms appear first in young tissues.
Reason: Relatively mobile elements like nitrogen, phosphorus etc are transported from young tissues to old senescing tissues

1. Both assertion & reason are correct and the reason is the correct explanation of assertion.
2. Both assertion & reason are correct but the reason is not the correct explanation of assertion.
3. Assertion is correct but the reason is incorrect
4. Both assertion & reason are incorrect

Q. A gardener was working in his field. He noticed that some of his plants have yellow leaves which he has never seen before. He called his friend who was an agricultural scientist. The scientist asked him to send the soil sample to his lab. After a few days, he got the following results:

1. The soil was deficient in Mg, Cu, Ca, K
2. The soil was deficient in N, K, S, Mo
3. The soil was deficient in Mn, Mg, Fe, Zn, Mo, N, K, S
4. The soil was deficient in N, Mg, Ca, K, Mo, Se, B, Cl

Q.

What causes depletion of micronutrients?

Q. Assertion (A): The deficiency symptoms of N, P and Mg are visible first in senescent leaves.
Reason (R): Elements like N, P and Mg are mobile.

1. Both A and R are true and R explains A
2. Both A and R are true and R does not explain A
3. A is true and R is false
4. Both A and R are false

Q. Assertion (A): The deficiency symptoms of N, P and Mg are visible first in senescent leaves.
Reason (R): Elements like N, P and Mg are mobile.

1. Both A and R are true and R explains A
2. Both A and R are true and R does not explain A
3. A is true and R is false
4. Both A and R are false

Q.

Deficiency of calcium causes localized tissue necrosis, necrotic margins on young leaves. Symptoms of this deficiency tend to appear mostly in young leaves and not older leaves because __________.

1. The element is relatively immobile.

2. The element is actively mobilized.

3. The element is not absorbed by the plant.

4. The element is present in excess.

Q.

The leaves turn and become yellow due to deficiency of:

1. Na

2. K

3. Ca

4. Fe

Q.

Deficiency of _______ in plants causes symptoms similar to deficiency of nitrogen. It also is a component of thiamine, biotin and CoA.

1. Calcium

2. Nitrogen

3. Boron

4. Sulphur

Q.

Identify the correct statement/s related to deficiency symptoms:

A. These are morphological changes shown by the plants in the absence of a particular element.

B. Absence of all elements develop similar deficiency symptoms.

C. Under continuous deprivation of an element, the plant develops tolerance and deficiency symptoms disappear slowly.

1. A & B

2. B & C

3. A

4. C

Q. Deficiency diseases occur in human and not in plants.

1. True
2. False

Q.

'Little leaf' is caused due to the deficiency of

1. Boron

2. Copper

3. Zinc

4. Phosphorus

Q. Farmers in particular region were concerned that premature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

1. Application of iron and magnesium to promote synthesis of chlorophyll and treatment of the plants with nitrogen
2. Frequent irrigation of the crop
3. Application of boron and calcium
4. Removal of all yellow leaves and spraying the remaining green leaves with 2, 4, 5- trichlorophenoxy acetic acid

Q. Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following:

1. Tyloses in vessels
2. Closure of stomata
3. Shrinkage of air spaces in spongy mesophyll
4. Flaccidity of bulliform cells

Q. Which of the following elements’ deficiency can lead to premature falling off of leaves and buds in young plants?

1. Mg
2. Cu
3. P
4. All of the above

Q.

Chlorotic patches appear due to deficiency of:

1. Ca

2. Na

3. S

4. Fe

Q.

Deficiency of _______ in plants causes symptoms similar to deficiency of nitrogen. It also is a component of thiamine, biotin and CoA.

1. Calcium

2. Nitrogen

3. Boron

4. Sulphur

Q. The deficiency disease which results in loss of chlorophyll from plant is called .

1. chlorosis
2. necrosis
3. whitening
4. rot