NCERT Solutions For Class 8 Science Chapter 1 Crop Management SAQs

NCERT Solutions For Class 8 Science Chapter 1 Crop Management Short Answer Questions

Question 1. Chemical substances are added to the soil. How do they differ from manure based on their formation?
Answer: Fertilisers are chemical substances that have a particular plant nutrient in concentrated form. They differ from manure based on formation, as these are produced in factories, while manure can be prepared by the farmer himself on the field.

CBSE Class 8 Science Chapter 1 Short Answer Exam Questions

Question 2. Write the functions of

1. Leveller
2. Hoe
3. Combine
4. Thresher

NCERT Class 8 Science Chapter 1 Crop Management Solutions

Question 3. Despite favourable climatic conditions, n farmer’s crop failed to give a good yield. Give the possible reasons for this.
Answer: If, despite favourable climatic conditions, the farmer’s crop failed to give a good yield, the possibilities may be

1. He did not use good-quality and healthy seeds.
2. His field was not well irrigated.
3. Manures/fertilisers were not timely and proper applied
4. Weeds were not removed
5. Seeds were not sown at an appropriate distance
6. The soil was not ploughed and levelled properly

Question 4. Name the principle followed lot huge huge-scale renting of farm animals. What facilities me provided to form animals?
Answer:

1. The practice of rearing farm animals on a large scale is called animal husbandry.
2. This practice is used to increase the number of livestock animals such as pigs. buffaloes, horses, sheep, etc.
3. In animal husbandry, animals are provided with the following facilities.
4. Proper food and water on time.
5. Appropriate shelter.
6. Have medical access.
7. Safe disposal of animal excreta.

NCERT Class 8 Science Chapter 1 Crop Production LAQs with Answers

Question 5. Give two examples of each

1. Kharif crop
2. Rabi crop

Answer:

1. Soya bean and groundnut are two examples of kharif crops
2. Rea and mustard are two examples of Rabi crops.

NCERT Solutions for Crop Management Chapter 1

Question 6. Write a paragraph in your own words on one of the following

1. Preparation of soil
2. Sowing
3. Weeding
4. Threshing

Answer:

1. Preparation of soil is the first step before sowing he crop. In this, the soil is ploughed to loosen it and make it aerated, which allows the roots to breathe easily.
2. This also helps in the growth of earthworms and microbes in the soil that further turn and loosen the soil.
3. The process of loosening and turning of soil is called tilling or ploughing and is followed by levelling and manuring.
4. Sowing is the process of planting seeds in the soil to grow crops. Traditionally, funnel-like tools were used for sowing. But nowadays, seeds are sown by a seed drill. It sows the seeds at regular intervals in the soil.
5. Weeding is the removal of weeds from the field. Weeding is an essential process as weeds are harmful for the growth of crops because they compete with the crop plants for water, nutrients, space, and light.

NCERT Solutions for Class 8 Science Crop Management

Threshing: The process in which the grain seeds are separated from chaff is called threshing. This is carried out with the help ofa machine called a combine, which is a combination of a harvester and a thresher.

Short Answer Solutions for Class 8 Science Chapter 1 SAQs

Question 7. If wheat is sown in the Kharif season, what would happen? Discuss.
Answer: The seeds of wheat need a low temperature and less humidity to grow. If they are sown in the Kharif (i.e., rainy season), the seeds would get destroyed due to excess water and would not grow.