Ncert Exemplar Solutions Class 8 Science Crop Production and Management

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Ncert Exemplar Solutions Class 8 Science Crop Production and Management

Welcome to NCTB Solutions. Here with this post we are going to help 8th class students for the Solutions of NCERT Exemplar Class 8 Science Book, Unit 1, Crop Production and Management. Here students can easily find step by step solutions of all the problems for Crop Production and Management, Also here our Science teacher’s are solved all the questions with easily understandable language with proper guidance so that all the students can understand easily.

Crop Production and Management Solution :

Multiple Choice Questions :

Question no – (1)

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

Answer :

The correct answer is option – (c)

Low temperature is not essential to grow maize.

Question no – (2)

Propagation of ginger is generally done using

Answer :

The appropriate answer is option – (b)

Propagation of ginger is generally done using stem (rhizome).

Question no – (3)

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

Answer :

The correct answer is option – (b)

It has a balance of all plant nutrients – This is not true for organic manure.

Question no – (4)

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

Answer :

The correct answer is alternative – (c)

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

Question no – (5)

Choose the combination of statements which indicate the need to irrigate crops.

Answer :

The correct answer is option – (a) i and ii

The correct statements are –

• Seeds require moisture for germination.

• Plants can absorb nutrients mostly in dissolved form.

Question no – (6)

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

Answer :

The appropriate option is – (a)

Hoe is used to remove weeds from the field.

Question no – (7)

Which of the following is not true for fertilisers?

Answer :

The correct option is – (d)

They are environment friendly – is not true for fertilisers.

Question no – (8)

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

Answer :

The appropriate option is – (a) i, iii, iv

The correct statements are,

• They interfere in harvesting.

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

• They affect plant growth.

Question no – (9)

The process of loosening and turning of soil is called

Answer :

The appropriate option is – (c)

The process of loosening and turning of soil is called tilling and ploughing.

Question no – (10)

The monsoon season in our country is during the months

Answer :

The correct answer is option – (b)

The monsoon season in our country is during the months June to September.

Question no – (11)

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

Answer :

The correct answer is option – (b)

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

Very Short Answer Questions :

Question no – (12)

Answer :

Here the odd one is Seed Drill.

Reason : Apart from seed drill all other are traditional methods of sowing seeds.

Question no – (13)

Answer :

If I were given a piece of land for cultivation the first thing I would do is to prepare the soil and by prepare the soil I mean to loosen the soil by means of ploughing so that the soil becomes breathable, so it becomes rich in nutrients and so that the roots can grow much easily.

Question no – (14)

Answer :

(i) Using good quality seed is the only criterion to get high yield

This statement is False.

Reason : Using good quality seed is not the only criterion to get high yield.

(ii) Growing different crops in different seasons in the same field will deplete the soil of nutrients

This statement is False.

Reason : Growing different crops in different seasons in the same field will enrich the soil of nutrients.

(iii) All crop plants are sown as seeds in the field

This statement is False.

Reason : Not all crop plants are sown as seeds in the field, some are transplanted.

(iv) Cells of root nodules of leguminous plants fix nitrogen

This statement is False.

Reason : The Rhizobium bacteria present in root nodules if the legumes fixes nitrogen.

(v) Freshly harvested grains must be dried before storing

This statement is True.

Question no – (15)

Answer :

Mustard are usually grown in the winter season that is from October to March and it is a rabi crop.

Question no – (16)

Answer :

The act of ploughing by the farmers promotes the growth of microbes and earthworms as it loosens the soil and provide space for them to grow

Short Answer Questions :

Question no – (17)

Answer :

Beera should plant Mustard that is a rabi crop and soybean that is a kharif crop, in order to practice crop rotation. This selection of crops will replenish the nutrients contents in his land. Between the two soybean will replenish his field with nitrogen because soybean is a legume plant so it will fix the nitrogen present in the atmosphere.

Question no – (18)

Answer :

(i) Sickle → (c) Harvesting

(ii) Hoe → (a) Ploughing

(iii) Seed drill → (b) Sowing

(iv) Sprinkler → (d) Irrigation

Question no – (19)

Answer :

The crops that are grown with the use manure such as animal and food waste are known as organic food, no other chemical fertilizers or pesticides are used to grow these crops as they can hamper the quality of crops.

Question no – (21)

Answer :

(a) The tool used with a tractor for sowing seeds in a field is called a seed drill.

(b) The advantages of using a seed drill are,

• It sows the seeds at uniform distances and depth.

• It covers the seeds with soil as it is sown and thus preventing from being eaten by birds.

• It saves the time and labour of the farmer.

Question no – (22)

Answer :

(a) The practice that is followed for large scale rearing of farm animals is known as animal husbandry.

(b) The animals that are farmed must be provided with proper food, shelter and care in order for them to survive.

Question no – (23)

Answer :

Kharif :

(i) Maize

(ii) Paddy

(iii) Groundnut

(iv) Cotton

Rabi :

(i) Mustard

(ii) Pea

(iii) Wheat

(iv) Gram

Long Answer Questions :

Question no – (24)

Answer :

Despite favourable climate the farmer’s crop failed to give good yield because of the following reason

• He must not have prepared the soil properly ,that is the clumps of soil were not loosen correctly.

• The seed that he sown must have been bad and unhealthy seeds.

• He must have add too much fertilizers on his crop or may have ignored to add good • manure to his field.

• The crops may not have been irritated at regular intervals of time for the proper growth of the crops.

• The weed or the undesirable plants were not removed from the field that could have deprived the crop of nutrients.

Question no – (27)

Answer :

(i) I L O S S – Silos.

(ii) N G I R E H T S H – Threshing.

(iii) R I T I A G I R O N – Irrigation.

(iv) V E R I R – River.

Question no – (28)

Answer :

(i) List the practices which are not environment friendly and why?

= The excessive use of urea and weedicides are not environment friendly as the excessive use of urea may harm the crops and the use of weedicides interferes with the farmer’s health.

(ii) What is the advantage of modern agriculture implements over traditional ones?

= The advantages of modern agriculture over implements over traditional ones are-

• It is non labour intensive that is it requires very few people to work.

• The crops yielded are of very good quality and quantity.

• It’s need very less time than traditional methods.

(iii) Name one weedicide and the precaution farmers must take during its application.

= 2,4-D is the name of one weedicides. The farmers should cover their mouth and nose with a piece of cloth at the time of spraying this weedicides.

Question no – (30)

Answer :

Terms related to agricultural practices in correct order are – Tilling and ploughing, sowing, manuring, irrigation, de-weeding, harvesting.

Other Chapter Solutions :

👉 Microorganisms : Friend and Foe