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

NCERT Solutions for Class 8 Science Chapter 1 help students clearly understand how crops are grown and managed. These class 8 science chapter 1 questions and answers explain each step of farming, such as preparation of soil, sowing, irrigation, adding manure and fertilizers, crop protection, harvesting, and proper storage. The solutions are written in simple language to make learning easy. By studying these answers, students learn about modern agricultural practices and tools used by farmers. This chapter also helps students understand how scientific farming methods support food production for a large population efficiently and sustainably.

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Class 8 Science Chapter 1 Crop Production and Management Questions Answers

Exercise Questions

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. Solution: (a) The same kind of plants grown and cultivated on a large scale at a place is called the crop . (b) The first step before growing crops is the preparation of the soil. (c) Damaged seeds would float on top of the water. (d) For growing a crop, sufficient sunlight, water, and nutrients from the soil are essential.
2. Match items in column A with those in column B.

Solution

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

Solution: Kharif crops: Paddy and maize Rabi crops:  Wheat and pea 

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

Solution: Preparation of the soil is the first step in agriculture. It involves loosening the soil to enable root penetration and ensure roots can breathe easily. This process promotes the growth of earthworms and microorganisms that add humus to the soil, enhancing its fertility. Additionally, loosening the soil brings nutrient-rich soil to the surface, which is vital for plant growth. Sowing is a critical process in crop production. It starts with the selection of healthy seeds. Sowing can be done using traditional methods or modern equipment like seed drills, ensuring seeds are planted at the right depth and spacing for optimal growth. Weeding involves the removal of unwanted plants, known as weeds, from the crop field. Weeds compete with crops for nutrients and water, reducing crop yield. Methods to control weeds include tilling the soil before sowing, manual removal, and the use of weedicides, although the latter can pose health risks to farmers due to the chemicals used. Threshing is the process of separating grains from the chaff. It is commonly done using a machine called a combine, which both harvests and threshes the crops. Threshing can also be performed through winnowing, where air is used to separate the lighter chaff from the heavier grains. 

5. What is irrigation? Describe two methods of irrigation that conserve water.

Solution: Irrigation is the process of providing water to crops at regular intervals. Two water-conserving irrigation methods are: (a) Drip Irrigation: This method delivers water directly to the plant roots, drop by drop, significantly reducing water waste and minimizing weed growth. (b) Sprinkler System: Ideal for uneven terrain and areas with limited water supply, this system uses perpendicular pipes with rotating nozzles to evenly distribute water over the crops, mimicking natural rainfall. 

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

Solution: Sowing wheat during the Kharif season would likely result in crop failure due to unfavorable conditions such as high temperatures, excessive rainfall, and pest infestations. Wheat requires cooler and drier conditions, which are not present during the Kharif season. 

7. Describe how a field's continuous crop planting affects the soil.

Solution: Planting crops continuously in a field depletes essential nutrients such as nitrogen, phosphorus, and potassium. This depletion reduces soil fertility and leads to lower crop yields. To restore soil nutrients and maintain soil health, it is essential to practice crop rotation and allow the field to lie fallow periodically. 

8. Explain how fertilizers are different from manures.

Solutions:

9. What are weeds? How can we control them? 

Solution: Weeds are undesirable plants that grow among crops and compete with them for nutrients, water, and sunlight. They can be controlled through various methods:

• Tilling: This involves turning the soil before sowing, which helps to uproot and kill weeds.
• Manual Removal: Physically pulling out weeds from the fields.
• Weedicides: Applying chemical sprays to eliminate weeds, though care must be taken as these can pose health risks to farmers.

What is Crop Production and Management?

When many plants of the same kind are grown in one big field, we call them a crop. For example, if a farmer grows only wheat in a large area, it is a wheat crop. Since everyone needs food to live, farmers have to grow crops on a very big scale. This is why we need to learn about class 8 science chapter 1 question answer to see how this big task is handled.

Management means taking care of the plants from the moment the seed is sown until the food reaches our plates. It is a long journey that requires water, sunlight, and a lot of care. Whether you are in class 4th or class 7th, understanding where your bread and rice come from is very interesting!

The Two Main Types of Crops

In India, crops are divided into two groups based on the season they grow in. This is a very important part of the class 8 science chapter 1 question answer.

Kharif Crops

These are the crops we plant during the rainy season. This usually starts in June and ends in September. These plants need a lot of water to grow big and strong.

• Examples: Paddy (rice), maize, soybean, and groundnut.

Rabi Crops

These crops are grown in the winter season, which starts in October and ends in March. They do not need as much rain as Kharif crops.

• Examples: Wheat, gram, pea, and mustard.

Knowing these seasons is part of the class 8 science chapter 1 question answer that every student should memorize because it helps us understand the rhythm of nature.

Basic Steps of Crop Production

Farmers follow a set of steps to make sure their plants grow healthy. In your class 8 science chapter 1 question answer pdf, you will find these steps explained in detail. Let's look at them simply:

Step 1: Preparing the Soil

Before planting, the soil must be loosened. Farmers use a "plough" or a "hoe" to turn the soil over. This helps the roots breathe and grow deep into the earth. It also helps friendly earthworms live in the soil.

Step 2: Sowing the Seeds

Once the soil is ready, we put the seeds in. But we can't just use any seeds! We must pick clean and healthy seeds. Farmers often put seeds in water; the ones that float are hollow and bad, while the ones that sink are good and healthy.

 Adding Manure and Fertilizers

Plants need food just like we do. They get their "food" or nutrients from the soil. Sometimes the soil gets tired and loses its nutrients. That is when farmers add manure or fertilizers. This is a common topic in class 8 science chapter 1 question answer.

• Manure: This is natural. It comes from animal waste and rotting plants. It is very good for the earth.

• Fertilizers: These are made in factories. They give specific nutrients like Nitrogen or Phosphorus very quickly, but we should not use too many of them as they can hurt the soil over a long time,

Irrigation and Protecting the Crop

Plants cannot live without water. Giving water to crops at different times is called irrigation. Some farmers use wells, ponds, or rivers. Modern ways include "Sprinkler systems" and "Drip systems" which save a lot of water by giving it directly to the roots.

While the crops grow, unwanted plants called "weeds" might grow next to them. These weeds steal the food and water meant for our crops. Farmers remove them by hand or use special juices called weedicides. This is a key part of class 8 science chapter 1 question answer crop production and management studies.

 Harvesting and Storage

When the crop is finally ripe, it is time to cut it. This is called harvesting. After cutting, we need to separate the grain from the stalks. Finally, the most important part is storage. If the grains stay wet, they will rot or get attacked by insects. Farmers dry them in the sun and store them in big metal bins or "Silos."

You can find all these points clearly written in a class 8 science chapter 1 question answer pdf for quick revision.

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