Crop Variety Improvement

Q.

A farmer and a housewife may have never studied biology, yet both of them know some of its general principles through experience. State any two principles which they know.

Q.

What are the disadvantages of golden rice?

Q.

Explain the various methods of crop improvement. Name one improved variety of Rice, Maize, Soyabean, Sunflower and Mustard.

Q.

What are the different types of agriculture?

Q.

Do you think Biology can help in further increasing the yield of food? If so, how?

Q. Mention the important objectives of crop variety improvement.

Q.

What are the different cropping systems?

Q.

Question 3
Find out the wrong statement from the following:

(a) White revolution is meant for the increase in milk production.
(b) Blue revolution is meant for the increase in fish production.
(c) Increasing food production without compromising with environmental quality is called as sustainable agriculture.
(d) None of the above

Q.

Write a few lines about: Kulaks

Q.

Which Kharif crop is used for cattle feed?

1. Sugarcane

2. Potato

3. Jowar and bajra

4. Wheat

Q.

What do you mean by crop variety improvement?

Q.

The science of improving crop varieties is called:

1. Selection

2. Plant breeding

3. Crop Rotation

4. Introduction

Q. Purposeful manipulation of qualities in plants to create new varieties with desired characteristics is called plant breeding.

1. False
2. True

Q.

_____ is a technique used for developing a new variety of crops.

Q.

Define green revolution, what are the common objectives of crop improvement ?

Q. Crop variety improvement is done to achieve which of the following objectives?

1. Higher yield

2. Degraded quality of the agricultural products

3. Lesser resistance to insects

4. Lesser resistance to pests

Q.

Question 3
Find out the wrong statement from the following:

(a) White revolution is meant for the increase in milk production.
(b) Blue revolution is meant for the increase in fish production.
(c) Increasing food production without compromising with environmental quality is called as sustainable agriculture.
(d) None of the above

Q.

Question 4
To solve the food problem of the country, which among the following is necessary?

(a) Increased production and storage of food grains
(b) Easy access of people to the food grain
(c) People should have money to purchase the grains
(d) All of the above

Q. What are the factors for which crop improvement is desirable?

i. Higher yield
ii. Improved quality
iii. Good looks
iv. Disease resistance
v. More height
vi. Wider adaptability

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

Q. Match the following cropping pattern with the respective pair of crops.

A. Mixed cropping​	i. Wheat and soybean ​alternatively in the same field ​in different seasons​
B. Intercropping​	ii. Wheat and pea in the same field sown randomly​
C. Crop rotation​	iii. Mustard and lentil in the same field in a definite pattern​

Q.

Operation Flood is otherwise called Green Revolution.

1. True

2. False

Q.

Name the oldest method of crop improvement.

Q. A variety of crops of desired characteristics can be achieved by introducing a gene.

1. True
2. False

Q.

What do you mean by the golden era of Indian agriculture?

Q.

Pusa Lerma is an improved variety of:

1. Soyabean

2. Wheat

3. Maize

4. Rice

Q. Match the following groups of activities for improving crop yields with the measures taken.

1. Hybridization
2. Irrigation
3. Pesticides

Q.

Name the improved varieties of the following crops :

(a) pigeon pea ;

(b) wheat

Q.

In mixed cropping, which two crops cannot be grown together?

Q.

In which from the new crops are introduced ?

Q.

What is plant breeding ?