Lakhmir singh solutions science class 8 Solutions for Chapter 1 crop production and management

Exercises in Chapter 1 crop production and management Grade 8

Exercise

Questions in Exercise

Which agricultural practice is carried out with the help of a sickle?

What name is given to the cutting and gathering of a food crop like wheat or paddy?

Name the tool (or implement) used in the traditional harvesting of crops.

Name the process of beating out the grains from the harvested crops.

Name the machine used in recovering the grain from the already cut crop.

Name the machine which does the cutting of standing crops and recovers the grain too.

Name the process in which grains are separated from chaff and hay with the help of wind.

Name three food materials obtained from animals.

Name two domestic animals that are used to obtained milk.

Name one meat yielding animal and one egg yielding animal.

Name an animal food obtained from an insect.

What name is given to that branch of agriculture which deals with feeding, shelter, health, and breeding of domestic animals?

Name one major food nutrient provided by fish.

Name the vitamin/vitamins present in cod liver oil.

Name one Government agency which is involved in procuring food grains (like wheat and rice) from farmers and storing them properly.

What type of organisms grows on stored food grains having higher moisture content?

Which crop is generally grown between two kinds of cereal crops in crop rotation to restore the fertility of soil?

State one advantage of growing a leguminous crop between two kinds of cereal crops.

Name the nitrogen-fixing bacteria present in root nodules of leguminous plants.

Which agricultural practice comes first: harvesting or weeding?

Which is the first step in the cultivation of a crop?

For what purpose is a hoe used?

Name the implement used in sowing.

Name the practice used for cultivating paddy.

Name the two types of substances which are added to two fields by the farmers to maintain the fertility of the soil.

Some grass is growing in a wheat field. What will it be known as?

Name one crop which can tolerate standing water (water-logging) in the field and one which can not.

Which is the best time for the removal of weeds?

Name two methods of irrigation with conserve water.

Fill in the following blanks

(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 soil.

(c)For growing a crop, sufficient sunlight, _______, and _________ from the soil are essential.

(d)Damaged seeds would ________on top of the water.

(e)Crop rotation helps in the replenishment of soil with __________

(f)The supply of water to crops at different intervals is called ___________

(g)The unwanted plants present in a crop field are called ____________

(h)Dried _________leaves are used for storing food grains at home.

(i)Many people living in the __________areas consume fish as a major part of their diet.

(a) Why is it is necessary to dry the harvested food grains before storage?

(b)What are the two ways in which farmers store food grains?

Out of the drip system and sprinkler system of irrigation, which one is more suitable :

(a) for uneven land?

(b)for sandy soil?

(c)for watering fruit plants?

(d)where the availability of water is poor?

(a)What are the weeds? Name any one weed found in a crop field.

(b)How do weeds affect the growth of crops?

Explain how the irrigation requirements depend on the nature of the crop.

Explain how the irrigation requirements of a crop depend on the nature of the soil in which the crop is grown.

Describe the sprinkler system of irrigation. State its advantages.

Explain the drip system of irrigation. State two advantages of the drip system of irrigation.

How do the irrigation requirements of a wheat crop differ from that of a paddy crop?

Explain why the frequency of irrigation of crops is higher in the summer season.

How are weeds removed from the crop fields? Name one implement used for weeding.

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

Which of the following are Kharif crops and which are rabi crops?

Wheat, Paddy, Gram, Maize, Mustard, Cotton, Soyabean, Linseed, Peas, Groundnut

What is a crop? Give two examples of crops.

What are the two types of crops based on seasons? Give one example of each type.

Name the various agricultural practices in the right sequence in which they are undertaken by the farmers.

Describe briefly, how soil is prepared for sowing the seeds.

Why do farmers carry out the leveling of the plowed fields?

What are the advantages of sowing seeds with a seed drill?

Explain why the seeds should be sown at the right spacings.

What is plowing (or tilling)? Name any two implements used for tilling the fields.

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Chapters in this book

Crop Production And Management

Microorganisms: Friends and Foe

Synthetic Fibres And Plastics

Materials: Metals and Non-Metals

Coal And Petroleum

Combustion And Flame

Conservation Of Plants And Animals

Cell Structure And Its Functions

Reproduction In Animals

Reaching The Age Of Adolescence

Force and Pressure

Friction

Sound

Chemical Effect Of Electric Current

Some Natural Phenomena

Light

Stars And The Solar System

Pollution Of Air And Water