Factors Affecting Yield of Crops

Q.

What are the advantages of using a seed drill?

1. Sowing seeds at proper depth.

2. Complete soil coverage of seeds.

3. Protection of seeds from birds.

4. Contributes in weeding.

Q.

The diagram alongside refers to the structure of human sperm:

(i) Label the part 1 - 4.

(ii) What are the number of chromosomes present in the nucleus of the sperm?

(iii) State the functions of parts 1, 3 and 4.

(iv) Where is sperm produced in man?

Q.

How does change in maturity duration benefit the farmer?

1. The farmer can grow multiple rounds of the crop.

2. It avoids nutrient loss.

3. Lesser resources are needed for crops.

4. Cost of production is lesser.

Q. The crops which are sown in the rainy season are called crops.

1. rabi
2. kharif
3. zaid

Q. Excessive use of fertilisers decreases the soil fertility.

1. True
2. False

Q.

The middle piece of a sperm contains the Golgi complex.

1. True
2. False

Q. Manure is considered better than fertilisers. Which of the following statement is true regarding manure?​​

1. It contains harmful chemicals.​
2. It is made in factories.​
3. It decreases the water retention.​
4. It improves the texture of the soil.​

Q. Sandeep is a farmer. Sandeep always perform a germination test before sowing to check the quality of seeds. Why do you think a check like this is neccesary?

1. Good seeds ensure higher yield.
2. Good seeds produce good-looking plants.
3. Good seeds produce plants that can withstand adverse conditions.
4. Good seeds usually produce disease-resistant plants.

Q. Identify the irrigation system in which water is supplied drop by drop to the roots.

1. Sprinkler system
2. Furrow irrigation
3. Drip irrigation
4. Basin irrigation

Q. Crop pricing policy is required to get the best out of agriculture.

1. False
2. True

Q. Wheat and mustard are _______ crop whereas tomato is a_______ crop.​

1. rabi; kharif
2. zaid; rabi
3. rabi; zaid
4. kharif; zaid​

Q.

Mention two advantages of using manure.

Q.

Why agrochemicals are formulated?

Q. The first step in agriculture before sowing seeds is of soil.

Q. Advantages of high yielding varieties

1. They a have a shorter life cycle
2. The yield per area is significantly high
3. They have a longer life cycle
4. The yield per area is significantly low

Q. Damaged seeds would ___________ on top of water.​ [1 mark]

Q. What are the crops grown during rainy season (June to September) and those grown in winter season (October to March) respectively known as?

1. Kharif and rabi crops
2. Rabi and kharif crops
3. Kharif and zaid crops
4. Rabi and zaid crops

Q. _____ is the process of separating grain seeds from chaff.

1. Harvesting
2. Threshing
3. Weeding
4. Irrigating

Q. Which of the following is a tool used for loosening and turning the soil?

1. Plough
2. Weed harrow
3. Seed drill
4. Harvester

Q.

Which of the following is not a crisis faced by the agricultural sector?

1. Lack of cultivable land

2. The high cost of production

3. The rise in the price of commodities

4. Climate change

Q. Label (A) (B) and (C) in the following diagram whose functions are as follows :-
A) Carries male genetic material
B) Contains mitochondria
C) Enables movement

1. A - Head B - Middle piece C - Tail
2. A - Nucleus B - Tail C - Head
3. A - Tail B - Nucleus C - Middle piece
4. A - Middle piece B - Head C - Nucleus

Q.

What are the important steps in the preparation of soil?

1. Turning and loosening

2. Turning and sowing

3. Loosening and weeding

4. Loosening and sowing

Q.

Which of the following elements can be obtained by plants directly from air?

1. Boron
2. Carbon
3. Calcium
4. Iron

Q. Organic manure is considered better than fertilizers. Which of these is true regarding organic manure?

1. It is more expensive
2. It contains harmful chemicals
3. It decreases the water retention
4. It improves the texture of the soil

Q. Yield is measured as a crop produced on a given piece of land during _____.

1. Rainy season
2. Winter season
3. Summer season
4. Single season