Important Questions for CBSE Class 8 Science Chapter 1 - Crop Production and Management

Multiple Choice Questions                                                                1 Mark

1. The instrument ‘combine’ is used for.

A. Sowing of seeds B. Harvesting the crops

C. Threshing D. Both harvesting and threshing

Ans: A correct option is an option (D) Both harvesting and threshing

2. Which one of the following statements is True about the storage of produce?

i. Harvested grains have less moisture.

ii. Farmers store grains in jute bags or metallic bins.

iii. Small scale storage of grains is done in silos and granaries

iv. Specific chemical treatments are required to protect crops from pests and microorganisms.

A. ii only B. i, ii and iv

C. ii and iv D. iii and iv

Ans: A correct option is an option (C) ii and iv

3.   is the festival associated with the harvest season.

A. Dussehra B. Ganesh Chaturthi

C. Baisakhi D. Christmas

Ans: A correct option is option (C) Baisakhi

4. Rajeev is a farmer. He has ploughed the field but needs to level it. Which one of the following can he use to level the field?

A. Leveller B. Harvester

C. Cultivator D. Seed drill

Ans: The correct option is option (A) leveller

5. Which one of the following is NOT a source of water for irrigation.

A. Tubewells B. Dams

C. Lakes D. Oceans

Ans: The correct option is option (D) ocean

6. Which one of these crops is cultivated during the winter season.

A. Cotton                 B. Linseed

C. groundnut D. Paddy

Ans: The correct option is option (B) linseed

Fill in the Blanks

1. Removal of unwanted and uncultivated plants are called.

Ans: Weeds

2. The same kind of plants cultivated at one place on large scale is called.

Ans: Crops

3. Is the cutting of the mature crop manually or by machines.

Ans:  Harvesting

4. Proper storage of grains is necessary to protect them from and .

Ans: Pests, Microorganisms

Short Answer Questions                                          2/3 Marks

1. Differentiate between Kharif and rabi crops.                               (3)

Ans: The difference between Kharif and rabi crops is: 

2. Identify the instrument given below and write a short note on it. (1 + 2)

Ans: The seed drill is the equipment.

Seed drills are being used in combination with tractors to plant seeds. Seed drills assure that seeds are planted evenly and at the same depth. During planting, the seed drill covers the seed with dirt, preventing birds from eating it.

3. Give four examples of fertilizers. (2)

Ans: Urea, ammonium sulphate, superphosphate, potash, NPK etc.

4. What do you mean by the term irrigation? (2)

Ans: Irrigation is the process of providing water to crops at regular intervals. Irrigation timing and frequency differ from crop to crop, soil to soil, and season to season.

5. If a handful of seeds are given to you, how will you separate healthy seeds from damaged ones? (2)

Ans: Fill a beaker halfway with water, add some seeds into it, and mix well. Set alone for a while. You'll notice that some seeds sink while others float. Damaged seeds become hollow and lighter, which allows them to float on water.

6. Describe briefly animal husbandry? (3)

Ans: 

a. Animal husbandry is the field of agriculture that deals with animals that provide meat, fiber, milk, or eggs.

b. It involves daily care, selective breeding, and livestock keeping. Animals, like plants, offer humans a wide range of food products for which they are grown domestically or commercially.

c. They are given adequate food, housing, and care, which is referred to as animal husbandry.

7. Why do you think the removal of weeds is essential? Write any one method to control weeds. (2 + 1)

Ans: Weed removal is necessary because weeds compete with crops for water, nutrients, and other fundamental requirements, causing crop development to be limited and yields to low.

Weeds are routinely removed near to the ground with the use of Khurpi. Another option is to use weedicides such as 2,4 D to control weeds

8. What is crop rotation? Why is it important? (2 + 1) 

Ans: Crop rotation is a way of restoring nutrients in the soil by planting various crops in order. Growing legumes as fodder one season and wheat the next is one example. It is significant because it aids in nitrogen replenishment in the soil.

9. List the advantage of manure over fertilizers. (3) 

Ans:

a. The water holding capacity of the soil improves by Manure.

b. The texture of the soil improves by Manure.

c. The number of friendly microbes increases by Manure.

10. Define harvesting. (2)

Ans: The cutting of mature crops manually or by machines is known as Harvesting. Harvesting of crops can be done either by pulling out the crops from the field or cutting them close to the ground. In our country, Harvesting is either done by sickle or by a harvester machine.

11. Choose the odd one out and give reason for the same. (1 + 1)

moat, dhekli, sickle, rahat

Ans:  Sickle stands out as the odd one out. All of the others are ancient irrigation systems, but a sickle is a tool used to harvest crops.

12. Correct the following statements. (1 + 1)

a. The separation of grains from the chaff is called weeding.

Ans: The separation of grains from the chaff is called threshing/winnowing.

b. Manure is a man-made inorganic salt.

Ans:  Fertiliser is a man-made inorganic salt.

Long Answer Questions 5 Marks

1. Farmers practise several agricultural activities over a period of time. 

a. List all the activities performed by the farmers during the cultivation of crops.

Ans: The activities involved are

1. Preparation of soil

2. Sowing

3. Adding manure and fertilisers

4. Irrigation

5. Protecting from weeds

6. Harvesting

7. Storage

b. Explain any one activity in detail.

Ans:  Adding manure and fertilizers: (Answer may vary)

Manure and fertilisers are given to the soil in the form of nutrients for the healthy development of plants.

Plants require vital nutrients from the soil to flourish. Crop cultivation continues to reduce the soil's nutrients. As a result, farmers must apply manure to their crops in order to restore the soil's nutrients. Manuring is the term for this procedure.

Manure is an organic material formed when plant or animal excrement decomposes. Organic manure is made from decomposing materials.

2. Explain in detail about agricultural implements used during the preparation of soil. 

Ans:  The main tools used for this purpose are plough, hoe and cultivator.

Plough: A plough is a tool made of wood or iron that is used to till or plough a field. Apart from tilling the soil, it is utilized for a variety of tasks such as crop fertilizing process, clearing weeds, and so on. A pair of bulls or other animals, such as camels or horses, pull this tool.

Hoe: A hoe is a basic instrument that is used to pull weeds from the soil and soften the soil. It has a long wooden or iron rod. A blade-like device is attached to one of its ends by a strong, wide, and bent plate of iron. Animals drag it along. 

Cultivator: Nowadays, a tractor-driven cultivator is used to plough. The usage of a cultivator saves both time and labour.

3. Why is the storage of produce important? Briefly describe the methods involved.

Ans:  Storage of produce is important because

a. If harvested grains are to be stored for an extended period of time, they must be protected from dampness, insects, rats, and microbes.

b. Grain that has been harvested has higher moisture. If those grains are not dried before storing, they may degrade or become infected with organisms, rendering them unsuitable for use or germination. As a result, the grains are adequately dried in the sun before being stored to minimise moisture content. Insects, pests, bacteria, and fungus are all prevented by this method.

c. Jute bags or metal bins are used by farmers to store crops. Large-scale grain storage, on the other hand, is done in silos and granaries to keep pests like rodents and insects away.

d. At home, dried leaves of neem are used to store food grains.

e. To preserve huge amounts of grains stored in large godowns from pests and microbes, special chemical treatments are necessary.

4. Write a short note on the following modern methods of irrigation. 

a. Sprinkler System

Ans:  

Sprinkler System: This method is particularly helpful on uneven terrain where there isn't enough water. At regular intervals, the perpendicular pipes with revolving nozzles on top are connected to the main pipeline. Water flows from the revolving nozzles when it is permitted to flow under pressure via the main pipe with the support of a pump. As though it were sprinkling, it is sprayed on the crop. Sprinklers are particularly handy for lawns, coffee plantations, and a variety of other crops.

b. Drip Irrigation System

Ans:  

Drip System: The waterfalls exactly near the roots in this arrangement, drop by drop. As a result, it's known as a drip system. It is the most effective method for watering fruit trees, gardens, and trees since no water is wasted. It's a gift in areas where there's a shortage of water.

Important Questions for Class 8 Science Chapter 1 – Free PDF Download

Overview

The Crop Production and management chapter is designed to give the students a better understanding of the harvesting process of various crops that is very important in daily life. As there are more than one crop and multiple growing processes according to the time of the year the crops are being harvested, it is not easy for the students to remember all the things. A huge syllabus of various subjects and a lack of understanding and revision can prove to be a roadblock in the way of a good result in the final examination. To overcome the hurdles, you need to understand the essential concepts well and also need to revise the chapter time and time again. To prepare well for the examination students need to practice all the important questions from chapter 1. All these questions have been explained effectively on Vedantu website.

Now let us find out the topics covered in chapter 1 of Class 8.

Important Topics Covered in Chapter 1 of Class 8

• Agricultural Practices

• Basic Practices of Crop Production

• Preparation of Soil (Agricultural Implements)

• Sowing (Selection of Seeds)

• Adding Manure and Fertilisers

• Differences between Fertiliser and Manure

• Irrigation

• Traditional Methods of Irrigation

• Modern Methods of Irrigation

• Protection from Weeds

• Harvesting

• Storage

• Food from Animals

Crop Production and Management Class 8 Important Questions

Important questions of chapter 1 of the science book of class 8 will help the students to gain theoretical knowledge about the production of the crop and the after production process. Practising these questions numerous times can help a student to write them properly in the final examination without any hiccup, and the answers are efficient enough to provide a student with good marks. The following is a brief concept of the chapter :

Definition and Type of Crops

Plants that are grown and cultivated to be letter consumed as food and after a certain period harvested are known as crops. There are various types of crops. They are –

Rabi Crops - Crops grown in between October and March, means during the winter season.

Kharif Crops - Crops are sown during the rainy season, which means from July to October.

Preparation of Soil

The quality of the soil is one of the most important factors that the farmers look for before sowing a crop. Soil preparation is done by using various tools and techniques as the production of crops depends on the soil.

Ploughing

Ploughing, which is also known as tilling, is the process by which the loosening and turning of the soil are done by using tools called plough, cultivator and hoe. Plough is a tool that many farmers use to add fertilizers in the soil, to remove weeds from the soil for the improvement of its quality. The tip of it is triangular and made by using the iron. The shaft attached with it is made by using wood. The other end of the shaft is placed on the bull’s neck with the help of a beam. Nowadays the wooden ploughs are replaced with iron ploughs. Hoe is also a device used for the digging purpose of soil. Most of the farmers now take the help of technology. Cultivators that are attached to the tractor are now used instead of ploughs for faster loosening of the soil.

Sowing of Seeds

The plantation of seeds is known as sowing. In the sowing process cultivator or plough is used as the loosening of soil is very important for sowing seeds. At the first stage, the seeds are sorted based on quality. The selection process is done by putting all the seeds in the water where the good seeds sink deep in the water while the seeds in the damaged condition float on the water. A tractor is used in the sowing process of seeds. Seed drills are used by the farmers to sow the seeds uniformly in the land at the desired depth.

Germination of Seeds

Germination means when a plant starts to emerge from a seed. The germination process takes place when the seeds are watered properly after being sown in the land.

The Fertility of the Soil

The soil needs to be fertile for the germination process of seeds. Fertilizers and pesticides are used to improve the quality of the soil. By adding fertilizers soil quality can be improved. Manures are made with decomposed organic substances like leaves, flowers. On the other hand, fertilizers are made by using mostly inorganic chemicals. Excessive use of fertilizers can increase the pH level of the soil and can also cause soil pollution and water pollution. Sometimes lands need to be left fallow for a certain period. In that period the land can regain the nutrients and can again be used for agricultural purposes.

Rotation of Crops

To keep the fertility of the soil intact crop rotation is important. Crop rotation means that the same crop does not grow on the same land. Different crops require different nutrients. By sowing different seeds, the fertility of soil can be restored.

Weed Removal

Weeds are plants that grow naturally on the field that can damage the crop. Weeds absorb all the nutrients, space, and water, and nothing lefts for the crop. Removal of weeds is necessary. Processes like tilling are used for weed removal along with weedicides. Tilling is discussed earlier. Weedicides are chemicals that are being used to kill weeds in the land. Manual methods are also there. The manual method means the removal of weeds by chopping them from the ground level.

Harvesting

Harvesting means when the crop is cut after the crop gets mature. Harvesting can be done in both manual and artificial ways. The manual method of harvesting is done by using a sickle. The artificial process is done by using a machine called a harvester.

Threshing and Winnowing

Grains cannot be consumed directly. They need to be loosened from the chaff and the process is known as threshing. Nowadays, machines are used for the threshing process. To separate grain seeds from the chaff help of wind is also taken and it is known as winnowing. Due to wind pressure grains that are heavier fall down, and the lighter chaff flies away.

Storage of Crops

After all the process storage of the harvested crops is done, the grain needs to be stored in a dry place away from the moisture to prevent any kind of fungal infestation. The place where the freshly harvested grains are stored is known as granaries.

Animal Husbandry

The management of animals that are being used in the farms and the harvesting process is known as animal husbandry.

Class 8^th Science Chapter 1 Important Questions

We ease the learning process of a student by enlisting important questions from the first chapter of the science of class 8 that can come in the final examination.

• What are the two main types of crops? Give examples of each type of crop.

• When are Rabi and Kharif Crops sowed in the soil?

• What are the tools that are being used in the loosening of the soil?

• Why is the rotation of crops important?

• Define the process of irrigation and also discuss the methods of irrigation.

• How can irrigation conserve water?

• State the differences between manures and fertilizers.

• Describe the threshing and winnowing process.

• Why is the overuse of chemical fertilizer harmful?

• How are good seeds selected before sowing?

Benefits of Important Question of Class 8 Science Chapter 1

The Crop Production and Management chapter helps students to secure good marks in the examination as almost all questions carrying almost 20 marks can come in the examination. The overall percentage will improve significantly if you read the answers to important questions along with class 8 science chapter 1 extra questions thoroughly. Few benefits that one can gain from the important questions for class 8 science chapter 1 are –

1. When a student will see these questions in the examination, he or she will not get tense.

2. Science chapter 1 class 8 important questions are collected with the help of thorough research, and a huge possibility is there that the questions will come in the examination.

3. All the class 8th science chapter 1 important questions and topics are discussed easily and simply.

4. Class 8 science chapter 1 important questions can help a student to prepare for the final examination.

Conclusion

The Crop Production and Management chapter is a very important chapter in the class 8 science book. The important questions as mentioned on Vedantu website will help the students to understand the important topics. Regular practice of the answers to the important questions can boost a student’s examination preparation.