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NCERT Solutions for Class 8 Science Chapter 1 Crop Production and Management



NCERT Solutions for Class 8 Science Chapter 1

In this page get ncert solutions for class 8 science chapter 1. NCERT Solutions for Class 8 Science Chapter 1 Crop Production and Management provides answers to questions from the textbook. To do well in the Class 8 exams, students should solve the sample problems at the end of each chapter in their NCERT books.

Solving NCERT questions will help you better understand various topics in the Crop Production and Management chapter. These NCERT Solutions for Class 8 Science Chapter 1 can help you get good grades because they cover important ideas in many formats such as MCQs and short answer problems, worksheets, and more. NCERT Solutions for Class 8 Science Chapter 1 are offered here to help students understand and clarify the subject.

NCERT class 8 science chapter 1 question answer


Question 1
Select the correct word from the following list and fill in the blanks.
float, water, crop, nutrients, preparation
(a) The same kind of plants grown and cultivated on a large scale at a place is called _________.
(b) The first step before growing crops is ________ of the soil.
(c) Damaged seeds would _________ on top of water.
(d) For growing a crop, sufficient sunlight and _________ and _________ from the soil are essential.

Answer
(a) crop.
(b) preparation
(c) float
(d) water ,nutrients

Question 2
Match items in column A with those in column B.
Crop Production and Management Chapter 1 Class 8 NCERT solutions

Answer
Crop Production and Management Chapter 1 Class 8 Science NCERT solutions

Question 3
Give two examples of each.
(a) Kharif crop
(b) Rabi crop

Answer
(a) Kharif crop: Paddy, maize
(b) Rabi crop: Wheat, gram

Question 4
Write a paragraph in your own words on each of the following.
(a) Preparation of soil
(b) Sowing
(c) Weeding
(d) Threshing

Answer
Crop Production and Management Chapter 1 Class 8 NCERT solutions

Question 5
Explain how fertilizers are different from manure.

Answer

Fertilizer

Manure

Fertilizers are commercially available plant nutrients.

Manure is a natural substance prepared by the decomposition of animal excreta and plant wastes.

They can be organic or inorganic in nature.

Manure is known to have a large quantity of organic materials and very little amount of plant nutrients.

They ensure healthy growth and development of plants by providing them with nitrogen, phosphorus, potassium, etc.

They help in enriching the soil with organic matter and nutrients.

The addition of fertilizers to the soil requires special guidelines such as dose time, post addition precautions, etc., to be followed.

The addition of manure does not require any special guidelines.

A fertilizer does not provide any humus to the soil.

Manure provides humus to the soil and increases soil fertility.

Its excessive use causes water pollution. It cannot replenish organic matter of soil.

It protects the environment and helps in recycling farm waste.

Question 6
What is irrigation? Describe two methods of irrigation which conserve water.

Answer
What is irrigation?

Supply of water to crops at appropriate intervals is called irrigation. The time and frequency of irrigation varies according to different seasons, crops, and soil types.
Two methods of irrigation which help in conservation of water are:
1) Sprinkler system: This system is more useful on uneven land, having fewer water supplies. In this method, water is supplied using pipes to one or more central locations within the field. When water is allowed to flow under high pressure with the help of a pump, it gets sprinkled on the crops.
2) Drip system: In this system, water is delivered at or near the roots of plants, drop by drop. This is the most efficient method of irrigation as there is no wastage of water at all. This method is important in areas where water availability is poor.

Question 7.
If wheat is sown in the Kharif season, what would happen? Discuss.

Answer

Kharif session is from June to October. If wheat is sown in the Kharif season, then the whole crop might get destroyed because of many factors such as lack of optimum temperature, adaptability, availability of pests, etc. Kharif season includes the rainy season, which is not favorable for the growth of wheat crop. Therefore, wheat crop should not be sown during this season.


Question 8

 Explain how soil gets affected by the continuous plantation of crops in a field.

Answer

If continuous plantation of crops is done in the fields then the soil will become poor in necessary nutrients like nitrogen, phosphorus, potassium, etc. Plants require nutrients for their proper growth and functioning. When a farmer continues to grow crops one after the other, then all nutrients available in the soil reduce and the crop yield decreases automatically.

Question 9

 What are weeds? How can we control them?

Answer

Weeds are unwanted wild plants that grow in the field. Weeds compete with the crop for nutrients, light, and space. As a result, crop plants get lesser nutrients, light, and space for their development.
Some important weeding methods are:
1) Weeds can be controlled using weedicides. It is a chemical, which is sprayed in the fields to kill all available weeds. Weedicides are not harmful to crops.
2) Tilling before sowing of crops also helps in removing weeds. Tilling uproots the weeds. The best time for the removal of weeds is before they produce flowers and seeds.
3) The manual method of removing weeds is with the help of a khurpi. It involves regular uprooting or cutting of weeds close to the ground.

Question 10
Arrange the following boxes in proper order to make a flow chart of sugar cane crop production.
Crop Production and Management Chapter 1 Class 8 NCERT solutions

Answer
Here is the flowchart for the sugar cane crop production
5 -> 6-> 4-> 7-> 2- > 3 -> 1

Question 11
Complete the following word puzzle with the help of clues given below.
Down
1. Providing water to the crops.
2. Keeping crop grains for a long time under proper conditions.
5. Certain plants of the same kind grown on a large scale.

Across
3. A machine used for cutting the matured crop.
4. A rabi crop that is also one of the pulses.
6. A process of separating the grain from chaff.
Crop Production and Management Chapter 1 Class 8 NCERT solutions
Answer
Down
1. IRRIGATION
2. STORAGE
5. CROP

Across
3. HARVESTOR
4. GRAM
6. WINNOWING

NCERT class 8 science chapter 1 question answer

Given below are some extra ncert class 8 science chapter 1 question answers that could be helpful for students while preparing for their exams. Along with ncert solutions for class 8 science chapter 1 extra questions given below will be an added bonus for the students.

Question
If wheat is sown in kharif season what would happen
Answer
If wheat is planted during the Kharif season (June to October), the entire crop may be destroyed due to a variety of factors such as a lack of optimal temperature, adaptability, pest availability, and so on. The rainy season, which is unfavorable for the growth of the wheat crop, is a part of the kharif season.

Question
Name a machine used for cutting the matured crop.
Answer
Harvester is the machine used for cutting the matured crop.

Question
Keeping crop grains for a long time under proper conditions is called __________.
Answer Storage of grains is the process of keeping crop grains in proper condition for an extended period of time.
Explaination:
Grain properties including grain quality, content, and color may vary as a result of high moisture and high temperature.
The grains could also be ruined by a variety of germs, insects, and rats. As a result, they must be kept from going bad, which is accomplished by storing grains.
As a result, Storage of grains refers to maintaining crop grains for a long time in optimal conditions.

Question
Preparation of soil short answer.
Answer
Given below is a short note or paragraph on preparation of soil
The loosening of the soil promotes the growth of various soil microorganisms, earthworms, and other beneficial organisms. The turning of the soil can replenish the soil with humus and other vital nutrients. Ploughing is the process of rotating and loosening soil in preparation for sowing. This is accomplished with the use of a plough, hoe, and cultivators.

Question
What is harvesting class 8
Answer
Harvesting is the term used to describe the cutting and gathering of crops. It is the process of cutting a crop once it has matured.
Harvesting can be done either manually with a sickle or mechanically with a device called a Harvester.
Harvesting is more than just cutting crops. It also involves separating grain seeds from the chaff.

Question
Supply of water to crops at appropriate intervals is called:
(a) irrigation
(b) cultivation
(c) sowing
(d) harvesting
Answer
Irrigation is the process of supplying water to crops at regular intervals.
Explaination
Irrigation is the technique of giving water to plants at regular intervals in a controlled manner.
Irrigation is mostly used in areas where there is insufficient rainfall for plant development.

Question
Write a paragraph on weeding.
Answer
Weeds are unwanted plants that grow alongside the crop. The act of weeding involves getting rid of these undesirable plants. Common weeds include Parthenium, Xanthium, and others.
The crop and weeds battle for resources including light, space, and nutrients. Due to presence of weeds crop plants receive less light, space, and nutrients for their growth. This makes them less productive.

Question
Write a paragraph on sowing
Answer
Sowing is a crucial part of growing crops. Before planting, seeds of a good variety that are clean and healthy are chosen. Farmers prefer to use seeds with a high yield. Sowing involves using tools to plant seeds in the ground. Some traditional tools, such as funnel-shaped tools, or modern tools, such as seed drills that sow seeds uniformly at equal distances and depths, save time and labor.

Question
Write a paragraph on threshing.
Answer
To separate the grain from the stalk, process of threshing is used. Additionally, it involves separating the wheat from the chaff. The earlier techniques involved beating grain ears or dragging the grains with animals. However, the threshing machine, which involved placing sheaves onto a rotating grinder, was developed later. The grains were separated by wooden beaters in it.

Question
What is irrigation describe two methods which conserve water.
Answer
Irrigation is the process of regularly supplying crops with water.
There are two irrigation techniques that spare water:
Sprinkler system: The rotating nozzle-topped perpendicular pipes are connected to the main pipeline at regular intervals. Water leaks from the rotating nozzles when water is allowed to pass through the main pipe under pressure with the aid of a pump. The crop is sprinkled with it to simulate rain.
A drip system: in this system the water drips slowly and carefully next to the roots. Hence, it is known as the drip system. Water is not at all wasted. In areas with poor water availability, it is a privilege.

Question Explain how soil gets affected by the continuous plantation of crops in a field. Answer A crop is a plant that can be grown in large numbers and harvested for food or money. It is the large-scale growing of the same kind of plants in the same place.
Planting crops changes the soil in the following ways:

  1. When crops are planted over and over again, the soil loses important things like phosphorus, potassium, nitrogen, and others.
  2. Nutrients are needed for plants to grow and work properly.
  3. The constant planting that farmers do to grow crops one batch at a time uses up nutrients in the soil, which lowers crop yields.
  4. When crops are planted over and over in the same field, the soil loses minerals and nutrients like nitrogen, phosphorus, potassium, and others. This causes crop production to go down.
  5. When a farmer grows one crop after another, all of the nutrients in the soil are used up, which hurts the crop yield.


Summary

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