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

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.