NCERT Exemplar solutions for Science [English] Class 8 chapter 1 - Crop Production and Management [Latest edition]

Which one of the following conditions is not essential to grow maize?

Propagation of ginger is generally done using

Which of the following statements is not true for organic manure?

The term used for the process of separation of grains from chaff is

Read the statements given below.

1. Seeds require moisture for germination. 
2. Plants can absorb nutrients mostly in dissolved form.
3. Irrigation protects crops from both frost and hot air currents.
4. Irrigation improves soil texture.

Choose combination of statements which indicate need to irrigate crops.

Which of the following tools would a farmer use to remove weeds from the field?

Which of the following is not true for fertilisers?

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 the plant growth.

Choose the correct combination of statements.

The process of loosening and turning of soil is called

The monsoon season in our country is during the months

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

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

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

State whether the following statement are True/False. Correct the false statement.

Using good quality seed is the only criterion to get high yield.

State whether the following statement are True/False. Correct the false statement.

Growing different crops in different seasons in the same field will deplete the soil of nutrients.

State whether the following statement are True/False. Correct the false statement.

All crop plants are sown as seeds in the field.

State whether the following statement are True/False. Correct the false statement.

Cells of root nodules of leguminous plants fix nitrogen.

State whether the following statement are True/False. Correct the false statement.

Freshly harvested grains must be dried before storing.

During which months do farmers grow mustard in India?

Which activity of the farmer can promote growth of earthworms and microbes in the field?

Beera,  wants to practice crop rotation in his field. Suggest a Rabi crop and a Kharif crop which will replenish his field with nitrogen. Which crop replenishes nitrogen and why?

Match the agricultural implements given in Column A with their use given in Column B.

(i)______ ; (ii) ______ ; (iii) ______ ; (iv) ______ 

What are organic foods?

From the word puzzle given as figure. Find at least eight words which are ‘farmer’s friends’. Classify them into living and non-living.

1. Name the tool used with a tractor for sowing seeds in a field.
2. What are the advantages of using this tool?

Name the practice followed for large scale rearing of farm animals.

What facilities are provided to farm animals?

Classify the following crops into Kharif and Rabi crops and write in the tabular column given below :

Maize, paddy, mustard, pea, gram, wheat, groundnut, cotton

Despite favourable climatic conditions, a farmer’s crop failed to give good yield. Give the possible reasons for this.

As a part of eco-club activity, students were asked to raise a kitchen garden in the school premises. They were provided with some materials given in the box. List the other materials you would require. How will you plan the garden? Write the steps.

Note : You have been asked to use only environment friendly materials.

Paddy is a major cereal crop in our country.

1. In which season is paddy cultivated?
2. Discuss the method of sowing.
3. What measures must be taken to prevent spoilage and insect attack of harvested grains?

Unscramble the words related to crop production and its management and write in the boxes given beneath them.

Now, using the circled letters, form one word which is an activity carried out in fields, after maturation of crops.

Given below is a conversation between two farmers Heera and Beera.

Heera : Brother Beera, your maize crops look beautiful. They have grown pretty fast.

Beera : Yes, I have sprayed urea this time. What about you?

Heera : Well, I am still relying on good old cow dung. I am saving money for buying a tractor.

Beera : That’s good. Tractor saves a Lot of time and labour.
Heera : Yes, it’s been very labour intensive for me and now these weeds have come up.
Beera : Try weedicides, they are very effective.
Now, answer the following questions.

1. List the practices which are not environment friendly and why?
2. What is the advantage of modern agricultural implements over traditional ones?
3. Name one weedicide and the precaution, farmers must take during its application. 

For discussion
Despite being one of the growing economies, our country still has a large section of population going hungry and malnourished. Do you think an efficient crop production mechanism is the only solution to this? Discuss in the class what else needs to be done to root out hunger and malnutrition from our country.

Terms related to agricultural practices are given below. Rearrange them in the correct sequence,