Important Questions for CBSE Class 8 Science Chapter 1 - Crop Production and Management - FREE PDF Download
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
Preparation of soil
Sowing
Adding manure and fertilisers
Irrigation
Protecting from weeds
Harvesting
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.
10 Important Topics of Class 8 Chapter 1 You Shouldn’t Miss!
Benefits of Class 8 Chapter 1 Science Important Questions
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. A few benefits that one can gain from the important questions for Class 8 Science Chapter 1 are–
When a student sees these questions in the examination, he or she will not get tense.
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.
All the class 8th science chapter 1 important questions and topics are discussed easily and simply.
Class 8 science chapter 1 important questions can help a student prepare for the final examination.
Conclusion
The Crop Production and Management chapter is very important in the class 8 science book. The important questions as mentioned on the Vedantu website will help the students to understand the important topics. Regular practice of the answers to the important questions can improve a student’s examination preparation.
Important Study Materials for Class 8 Science Chapter 1
CBSE Class 8 Science Important Questions for All Chapters
Additional Study Materials for Class 8 Science
FAQs on CBSE Class 8 Science Important Questions Chapter 1 - Crop Production and Management
1. What are the key agricultural practices a student must know for the CBSE Class 8 Science exam 2025-26?
For Chapter 1, Crop Production and Management, students should be familiar with the seven key agricultural practices in order. These are often asked as a long-answer question:
- Preparation of Soil: The first step involving ploughing and levelling.
- Sowing: The process of planting seeds.
- Adding Manure and Fertilisers: Supplying nutrients to the soil.
- Irrigation: Supplying water to crops at regular intervals.
- Protecting from Weeds: The removal of unwanted plants.
- Harvesting: The cutting of mature crops.
- Storage: Storing the grain safely after harvesting.
2. What is the difference between Kharif and Rabi crops? Provide examples for each as per the NCERT syllabus.
This is a frequently asked 2 or 3-mark question. The key differences are:
- Kharif Crops: These are sown in the rainy season (usually June-July) and harvested in autumn (September-October). They require more water. Examples include paddy (rice), maize, soybean, and cotton.
- Rabi Crops: These are sown in the winter season (usually October-November) and harvested in spring (March-April). They require less water than Kharif crops. Examples include wheat, gram, pea, and mustard.
3. Why are manures considered better than chemical fertilisers for long-term crop production?
This is a high-order thinking question (HOTS) often asked for 3 marks. Manure, being an organic substance, is considered superior to chemical fertilisers for several reasons:
- It enhances the water-holding capacity of the soil.
- It makes the soil porous, which facilitates the exchange of gases.
- It increases the number of friendly microbes in the soil, improving soil health.
- It improves the overall texture and fertility of the soil without causing pollution.
4. Explain the process a farmer uses to select healthy seeds from a batch before sowing.
A common activity-based question asks how to separate healthy seeds. The method is based on density. A farmer can take the seeds and put them in a bucket of water. Damaged seeds are often hollow or eaten by pests, making them lighter. These lighter, damaged seeds will float on the water's surface. The healthy, heavier seeds will sink to the bottom and can then be collected for sowing.
5. What are modern methods of irrigation and why are they important in regions with water scarcity?
Modern irrigation methods are designed to use water economically. Their importance lies in conserving water. The two main systems are:
- Sprinkler System: Water is sprayed on the crops through rotating nozzles, much like rainfall. It is very effective for uneven land and sandy soil where water is not available in abundance.
- Drip System: Water falls drop by drop directly at the base of the roots. This is the most efficient method as it minimises water wastage through evaporation. It is a boon for regions facing acute water shortages.
6. Why is the removal of weeds, or 'weeding', an essential step in agriculture?
Weeding is crucial because weeds are unwanted plants that grow alongside the main crop. They compete with the crop for essential resources such as water, nutrients, sunlight, and space. This competition can stunt the growth of the crop, leading to a significantly lower yield. Therefore, removing them is vital for ensuring the health and productivity of the desired crop.
7. What is crop rotation and how does it help in replenishing soil nutrients naturally?
Crop rotation is the practice of growing different types of crops in the same area in a sequential seasons. It is a crucial method for maintaining soil fertility. For example, farmers often grow leguminous plants (like peas or beans) in one season and a cereal crop (like wheat) in the next. The leguminous plants have rhizobium bacteria in their root nodules, which fix atmospheric nitrogen into the soil. This naturally enriches the soil with nitrogen, reducing the need for nitrogenous fertilisers for the subsequent crop.
8. What are the main agricultural implements used for soil preparation, and what is the function of each?
The three main implements used for preparing the soil are:
- Plough: Used for tilling or loosening the soil, adding fertilisers, and removing weeds. It can be made of wood or iron.
- Hoe: A simple tool used for removing weeds and for loosening the soil. It consists of a long rod with a strong, broad, bent plate of iron fixed to one of its ends.
- Cultivator: A modern implement driven by a tractor. It is used for ploughing and saves both labour and time compared to traditional methods.
9. What is the importance of proper storage of grains after harvesting?
Proper storage is a critical final step because harvested grains need to be protected from several threats to prevent spoilage and ensure they can be used later. If not stored correctly, grains can be attacked by moisture, insects, rats, and microorganisms like fungi and bacteria. High moisture content, in particular, promotes the growth of mould, rendering the grains unfit for consumption or germination. Therefore, grains are first dried properly and then stored in sealed containers like jute bags, metallic bins, or large-scale silos and granaries.
10. What type of questions, from 1-mark to 5-marks, can be expected from Class 8 Science Chapter 1?
For exams, you can expect a variety of questions from this chapter:
- 1-mark questions: Usually definitions (e.g., What is harvesting?), fill-in-the-blanks, or MCQs on specific tools (e.g., a combine).
- 2 or 3-mark questions: Short answer questions like differentiating between manure and fertiliser, explaining the seed separation activity, or listing advantages of crop rotation.
- 5-mark questions: Long answer questions that require detailed explanations, such as describing all the agricultural practices in sequence or explaining modern irrigation methods with diagrams.
