3. Agronomy

Question 1

What is mycorrhiza?

Answer 1

A symbiotic association between fungi and higher plants

Mycorrhizae enhance nutrient and water absorption for plants.

Question 2

What does VAM stand for?

Answer 2

Vascular Arbuscular Mycorrhiza

VAM is used for improving plant nutrient uptake.

Question 3

Which amino acid is deficient in cereals?

Answer 3

Lysine

Lysine is essential for protein synthesis in humans.

Question 4

Which amino acid is deficient in legumes?

Answer 4

Methionine

Methionine is important for various metabolic processes.

Question 5

What is the most suitable machine for paddy cultivation?

Answer 5

Power tiller

Power tillers are used for land preparation in wet conditions.

Question 6

What percentage of nitrogen and phosphorus does ammonium polyphosphate contain?

Answer 6

15% N & 62% P

Ammonium polyphosphate is a common fertilizer.

Question 7

What is the purpose of the Tz (terrazolium) test?

Answer 7

To test seed viability

This test evaluates the germination potential of seeds.

Question 8

What is the maintained water level in the wet nursery of rice?

Answer 8

5 cm

This level helps in optimal seedling growth.

Question 9

What is the optimum depth of puddling in rice cultivation?

Answer 9

5 cm

Puddling helps in controlling weeds and improving water retention.

Question 10

Which layer absorbs ultraviolet radiations?

Answer 10

Ozone layer

The ozone layer protects living organisms from harmful UV rays.

Question 11

Who was the first Indian director of IARI?

Answer 11

Dr. B. Vishvanath

IARI stands for Indian Agricultural Research Institute.

Question 12

What is the most critical stage of irrigation in wheat?

Answer 12

CRI stage (21 days after sowing)

Proper irrigation during the CRI stage is crucial for yield.

Question 13

What is Jhuming?

Answer 13

A practice of rice cultivation in the eastern part of India

Jhuming involves shifting cultivation techniques.

Question 14

What is the basic objective of sustainable agriculture?

Answer 14

To maintain ecological balance

Sustainable agriculture aims to meet current needs without compromising future resources.

Question 15

What are plants growing in salt water known as?

Answer 15

Halophytes

Halophytes are adapted to saline environments.

Question 16

How is crop canopy temperature measured?

Answer 16

Infra-red thermometer

This measurement helps assess plant stress levels.

Question 17

Reclamation disease is caused due to deficiency of

Answer 17

Copper

Question 18

What hormone is related to drought tolerance?

Answer 18

Abscisic acid (ABA)

ABA helps plants respond to water stress.

Question 19

What is the contribution of livestock in agriculture?

Answer 19

Provides manure, labor, and food

Livestock plays a significant role in sustainable farming systems.

Question 20

What hormone is used as an herbicide?

Answer 20

2,4-D, Dicamba

These hormones are synthetic auxins used to control weeds.

Question 21

What element is available in both anion and cation forms?

Answer 21

Nitrogen

Question 22

What is the dormancy breaking hormone?

Answer 22

Gibberellic acid

Gibberellic acid is used to promote seed germination.

Question 23

What disease is caused by fungus?

Answer 23

Ringworm disease

Ringworm is a common fungal infection affecting the skin.

Question 24

What is the main cause of rainfall in Tamil Nadu?

Answer 24

Monsoon

The North East monsoon is particularly significant for this region.

Question 25

How can stress hardening in plants be achieved?

Answer 25

By applying Abscisic acid (ABA) ## Footnote Stress hardening helps plants tolerate adverse conditions.

Question 26

What is the maximum permissible limit of biuret in urea?

Answer 26

1.5% ## Footnote Biuret is a compound that can affect the quality of urea fertilizers.

Question 27

What is the carbon content in organic matter?

Answer 27

58% ## Footnote This percentage reflects the organic matter's contribution to soil carbon sequestration.

Question 28

Which bio fertilizer is used in wheat?

Answer 28

Azatobacter ## Footnote Azatobacter is a nitrogen-fixing bacteria beneficial for wheat.

Question 29

Which bio fertilizer is used in sorghum and grasses?

Answer 29

Azospirillum ## Footnote Azospirillum promotes root growth and enhances nutrient uptake.

Question 30

Vertical mulch is used in which type of soils?

Answer 30

Black cotton soils ## Footnote Vertical mulching helps in moisture conservation and soil fertility.

Question 31

Who provided the criteria of essentiality in 1939?

Answer 31

Arnon & Stout ## Footnote Their work helped define essential nutrients for plant growth.

Question 32

What is the optimum spacing for wheat?

Answer 32

22.5 cm (line to line) ## Footnote Proper spacing is crucial for maximizing yield.

Question 33

What is the nontraditional area for cultivating wheat?

Answer 33

Eastern India ## Footnote Traditionally, wheat is grown in northern and western parts of India.

Question 34

What is the major P fertilizer commonly used in India?

Answer 34

DAP ## Footnote DAP stands for Diammonium Phosphate, widely used for phosphorus supply.

Question 35

Which state has the minimum BPL population?

Answer 35

Punjab ## Footnote BPL stands for Below Poverty Line, indicating economic status.

Question 36

Where is the maximum number of BPL people found?

Answer 36

Bihar ## Footnote Bihar has a significant population living below the poverty line.

Question 37

Which bio fertilizer is more suited for sugarcane?

Answer 37

Azatobacter ## Footnote Azatobacter enhances nitrogen availability for sugarcane.

Question 38

What is the depth of sowing for soybean seed?

Answer 38

3 cm ## Footnote Correct sowing depth is important for seed germination and growth.

Question 39

What is the first variety of rice introduced in India?

Answer 39

TN-1 (1964-65) ## Footnote TN-1 was developed for higher yield and adaptability.

Question 40

What is Indian mustard known as scientifically?

Answer 40

Brassica juncea ## Footnote Brassica juncea is cultivated for its seeds and oil.

Question 41

What is classified as an explosive fertilizer?

Answer 41

Ammonium nitrate ## Footnote Ammonium nitrate is used in both fertilizers and explosives.

Question 42

What is the most prominent soil group of India?

Answer 42

Alluvial soil ## Footnote Alluvial soils are fertile and support major crops.

Question 43

What percentage of sulphur is contained in SSP?

Answer 43

12% ## Footnote SSP stands for Single Super Phosphate, a common phosphorus fertilizer.

Question 44

Which micronutrient is deficient in Indian soils?

Answer 44

Zn ## Footnote Zinc deficiency can lead to various crop health issues.

Question 45

Which macronutrient is mostly deficient in Indian soils?

Answer 45

Nitrogen ## Footnote Nitrogen is essential for plant growth and development.

Question 46

What type of implement is a spike tooth harrow?

Answer 46

Secondary tillage ## Footnote Spike tooth harrows are used to prepare seedbeds.

Question 47

What is the most widely used material for correcting soil acidity?

Answer 47

Lime ## Footnote Lime application raises soil pH and improves nutrient availability.

Question 48

In which cultivation method is Diara cultivation followed?

Answer 48

Cucurbits ## Footnote Diara cultivation is practiced in flood-prone areas.

Question 49

What is the C: N ratio of organic matter?

Answer 49

10:1 ## Footnote This ratio is significant for microbial activity in soil.

Question 50

When was the National Seed Act passed?

Answer 50

1966 ## Footnote This act regulates seed quality and distribution in India.

Question 51

When was the National Seed Corporation (NSC) established?

Answer 51

1963 ## Footnote NSC plays a key role in seed production and distribution.

Question 52

What are root promoting hormones?

Answer 52

IBA ## Footnote IBA stands for Indole-3-butyric acid, a plant hormone.

Question 53

What is the hormone responsible for flower and fruit setting?

Answer 53

NAA ## Footnote NAA stands for Naphthalene acetic acid, used in agriculture.

Question 54

When is bench terracing done?

Answer 54

When slope is more than 15% (16-33%) ## Footnote This method helps in soil conservation on steep lands.

Question 55

What is mass per unit volume called?

Answer 55

Bulk density ## Footnote Bulk density is an important soil property affecting porosity.

Question 56

What type of soil is a disk plough used for?

Answer 56

Tough soil ## Footnote Disk ploughs are effective in breaking hard soil layers.

Question 57

What is the first man-made cereal?

Answer 57

Triticale ## Footnote Triticale is a hybrid of wheat and rye, developed for better yield.

Question 58

What is the cheapest nitrogen-containing fertilizer?

Answer 58

Urea ## Footnote Urea is widely used due to its high nitrogen content and low cost.

Question 59

What is the first product of urea hydrolysis?

Answer 59

Ammonium carbamate ## Footnote Urea hydrolysis is a key process in nitrogen availability for plants.