NCERT Class VIII Science Solutions: Chapter 1-Crop Production and Management Part 2

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Question 8:

Given below are statements about the harmful effects of weeds on crop plants.

  1. They interfere in harvesting.

  2. They help crop plants to grow healthily.

  3. They compete with crop plants for water, nutrients, space and light.

  4. They affect plant growth.

Choose the correct combination of statements.

  1. (i), (iii) and (iv)

  2. (iii), (iv)

  3. iii only

  4. (i), (ii), (iii), (iv)

Answer: A

Question 9:

The process of loosening and turning of soil is called

  1. irrigation and manuring

  2. digging and winnowing

  3. tilling and ploughing

  4. harvesting and storage

Answer: C

Question 10:

The monsoon season in our country is during the months

  1. April to December

  2. June to September

  3. November to March

  4. January to May

Answer: B

Question 11:

The system of irrigation where in water is supplied drop by drop near the roots of plants, is called

  1. pulley system

  2. drip system

  3. sprinkler system

  4. lever system

Answer: B

Image of drip system

Drip System

Image of drip system

VERY SHORT ANSWER QUESTIONS

Question 12:

Pick out the odd one from the following words given in the box and give reason for it.

Plough, Seed Drill, Hoe, Chain Pump, Sickle

Answer:

Seed drill, because it is a modern agricultural implement unlike the others which are all traditional tools.

Question 13:

If you are given a dry piece of land for cultivation what will you do before sowing the seeds?

Answer:

The field will be watered, tilled and ploughed before sowing seeds