Factors for Which Variety Improvement Is Done

Q.

What were the negative consequences of the green revolution?

Q.

What are the desirable agronomic characteristics for crop improvement?

Q.

What is a limiting nutrient in an ecosystem?

Q.

Question 2
What are the desirable agronomic characteristics for crop improvement?

Q.

What is Agricultural development?

Q. What are the factors for which crop improvement is desirable?
i. Higher yield
ii. Improved quality
iii. Good appearance
iv. Disease resistance
v. More height
vi. Wider adaptability

1. i, ii, iii. iv
2. i, ii, iv, v
3. i, ii, iv, vi
4. ii, iii, v, vi

Q.

The aim of plant breeding is to produce:

1. Disease free varieties

2. High yielding varieties

3. Early maturing varieties

4. All of the above

Q. Which of the following is an example of 'wider adaptability'?

1. A crop that produces good quality seeds.
2. A crop that shows lesser resistance to insects.
3. A crop that withstands salinity.
4. All of the above

Q. Question 2
What are the desirable agronomic characteristics for crop improvement?

Q. Biotic factor which destroys food grains is :

1. bacteria
2. humidity
3. moisture
4. frost

Q.

What are the desirable agronomic characteristics for crop improvements? Give one purpose of these desirable characters. [3 MARKS]

Q.

Mention five factors with examples affecting crop improvement. [5 MARKS]

Q. Explain briefly the major groups of activities for improving crop yields?

Q.

An abiotic factor which affects crop production is____.

1. pest

2. weed

3. temperature

4. bacteria

Q.

Why did the green revolution succeed in India?

Q.

An abiotic factor which affects crop production is temperature.

1. True
2. False

Q.

An abiotic factor which affects crop production is____.

1. Pests

2. Diseases

3. Temperature

4. None of these

Q.

Question 2
What factors may be responsible for losses of grains during storage?

Q.

Which of the following is not a factor for which variety improvement is done?

1. Higher yield

2. Annual Rainfall

3. Biotic and abiotic resistance

4. Change in maturity duration

Q.

Which of the following is not a factor for which variety improvement is done?

1. Higher yield

2. Annual rainfall

3. Biotic and abiotic resistance

4. Change in maturity duration

Q.

Plant breeding aims to produce:

1. disease-free varieties

2. low-yielding varieties

3. late-maturing varieties

4. low disease resistance to causing bacteria

Q.

Plant breeding aims to produce:

1. disease-free varieties

2. high-yielding varieties

3. early-maturing varieties

4. all of these

Q. Which of the following is/are the main aim of crop variety improvement?

1. Phosphorus

2. Copper

3. Hydrogen

4. Manganese

Q.

Question 2
What are the desirable agronomic characteristics for crop improvement?

Q. Name the production system that sustains that health of soils, ecosystems and people.
(a) organic farming (b) crop rotation
(c) mechanical cultivation (d)pest control

Q.

Plant breeding aims to produce:

1. disease-free varieties

2. high-yielding varieties

3. early-maturing varieties

4. all of these

Q. There are three agencies that deal with the methods of increasing crop productivity. A farmer wants to enrich his soil with the best quality nutrients. Which agency he should consult?

1. Agency C deals with crop protection management

2. Agency B deals with crop production management

3. Agency A deals with crop variety improvement