Class 8 Crop Production and Management Extra questions

Chapter 1 Crop Production and Management

Chapter 1 Crop Production and Management | NCERT Solutions Class 8 Science | crop production and management class 8 notes for all students..

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.

Correct Answers

  1. Crop
  2. Preparation
  3. Float
  4. Water and nutrient

2. Match items in column A with those in column B.

A B
(i) Kharif crops  (a) Food for cattle
(ii) Rabi crops  (b) Urea and super phosphate
(iii) Chemical fertilizers  (c) Animal excreta, cow dung urine and plant waste
(iv) Organic manure (d) Wheat, gram, pea
(e) Paddy and maize

Answers –

3. Give two examples of each.
(a) Kharif crop – Maize and Soybean
(b) Rabi crop – Wheat and Mustard

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

Preparation of soil-

Before growing a crop, the soil must be prepared. It is important to loosen soil and turn it in agriculture. The roots will be able to grow deeply into the soil. Loose soil allows roots to breathe even when buried deep in the ground.

Sowing –

Planting seeds in the soil is known as sowing. Sowing can be done in two different ways. They are:(i) Sowing by hand; (ii) Sowing with a sand drill.

Weeding –

The removal of undesirable plants called weeds is called weeding.

Threshing-

Threshing is the process of separating the grains from the chaff.

Explain how fertilizers are different from manure.

A fertilizer is a chemical substance which contains a specific nutrient. Urea is one example of a fertilizer while Manure is an organic substance produced by decomposing plants or animals.

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

Irrigation is the process of providing crops with water at regular intervals. Irrigation time and frequency vary from crop to crop, soil to soil, and season to season.

The main methods used are as follows:

Sprinkler System

The perpendicular pipes are connected to the main pipeline at regular intervals with rotating nozzles on top. With the help of a pump, water flows through the main pipe, escaping from the rotating nozzles. It sprinkles on the crop as if it were raining.

Drip system

During this system, the water falls drop by drop directly near the roots. This is called a drip system. Fruit trees, gardens, and trees can be properly watered using this technique.

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

Plants cannot tolerate too much water during the rainy season, so wheat sown during kharif won’t grow well.

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

Nutrients are necessary for plants to grow and function properly. If the fields are planted continuously with crops, the soil will become depleted of nutrients like nitrogen, phosphorus, potassium, etc. This affects the quality of the soil .As a result, nutrients once consumed by crop must be replenished so that soil can get full nutrients back and be prepared for harvest.

What are weeds? How can we control them?

A weed is an unwanted plant. Weeds can also be controlled by using chemicals called weedicides.

Arrange the following boxes in proper order to make a flow chart of sugarcane crop production.

  • Preparation of Soil
  • Ploughing the Field
  • Sowing
  • Manuring
  • Irrigation
  • Harvesting
  • Sending crop to sugar factory

 

Also Read –

Chapter 1 Crop Production and Management Extra Question Answers

 

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