Class 8 Science Chapter 1 is “Crop Production and Management”. Get here the latest updated NCERT Solutions of Crop Production and Management Class 8 Science Chapter 1 as per latest CBSE syllabus.
Class 8 Science Chapter 1 : Crop Production and Managements
“Crop Production and Managements” is the first chapter in the Science Text book of Class 8 . This chapter includes the End Exercise and Intext questions related to – Crop, types of Crop, Crop Management, Rabi Crops, Kharif Crops, etc.
Crop Production and Managements Class 8 Science Chapter 1 [ NCERT Solutions ]
|Chapter||Chapter 1 : Crop Production and Managements|
|Study Material||NCERT Solution ( Intext and End Exercise )|
|Number of Questions||Total 11 Questions|
|Text Book Name||Science ( NCERT Text Book in Science for Class 8 )|
End Exercise Questions Ncert Solutions
Q1 . Select the correct word from the following list and fill in the blanks
float, water, crop, nutrients, preparation
• The same kind of plants grown and cultivated on a large scale at a place is called _____________.
Answer : Crop
Explanation : The same kind of plants grown and cultivated on large scale at a place is called Crop.
• The first step before growing crops is _____________ of the soil.
Answer : Preparation .
Explanation : The first step before growing any crop is the Preparation of the soil and the field.
• Damaged seeds would _____________ on top of water
Answer : float
Explanation : Since damaged seeds are hollow from inside so they would float on top of water.
• For growing a crop, sufficient sunlight and _____________ and _____________ from the soil are essential.
Answer : Nutrients and water
Explanation : Plants do photosynthesis, so for it sufficient sunlight is provided through sun energy and Nutrients and Water are absorbed by plants from the soil.
Q2. Match items in column A with those in column B.
|Manuring||Food for cattle|
|Rabi crops||Urea and super phosphate|
|Chemical fertilisers||Animal excreta, cow dung urine and plant waste|
|Organic manure||Wheat, gram, pea|
|Paddy and maize|
Answer : The correct matching of column A with Column B is given in below table.
|Manuring||Paddy and maize|
|Rabi crops||Wheat, gram, pea|
|Chemical fertilisers||Urea and super phosphate|
|Organic manure||Animal excreta, cow dung urine and plant waste|
Q3. Give two examples of each
1. Kharif Crop
2. Rabi Crops
Examples of Kharif Crops are given below :
• Green bean
Examples of Rabi Crops are given below :
Q4. Write a paragraph in your own words on each of the following
1. Preparation of soil
Preparation of Soil
When we grow a crop on field , then we must prepare the soil by doing various process. These processes help the soil to get loosen comfortable for plants to absorb nutrients easily. The preparation of soil consists of the following process :
• Loosening of soil
• Ploughing of soil
• Manuring of Soil , etc
Sowing : The process of putting seeds in the soil is known as sowing . Various methods are used by farmers to sow the seeds in the field. Some of them are mentioned below :
• Broadcasting : Sowing seeds by scattering them in the field via hand.
• Seed Drills : Sowing the seeds through funnel shaped tool
Weeding : The process of removing weeds from the field is known as weeding . The weeds are the unwanted plants that grown along with the crop and some of these unwanted plants are dangerous for the crop as they take all the nutrients that was made in the soil for the main crop. These are needed to be removed.
Q5. Explain how fertilisers are different from manure.
Answer : The difference between fertilizers and manure is given below
|Fertiliser is an inorganic salt||Manure is an organic compound which obtained by the decomposition from the organic waste like human waste , cow dung cakes, plants residues , etc|
|Soil does not get any humus due to fertilisers||Manure is good source of humus to the soil|
|Fertilisers are rich in nutrients like potassium, nitrogen etc.||Manure is less nutrients as compared to fertilizers|
|Fertilizers are made in factories||Manure is made in field / at home.|
|Fertilizers does not increase the number of friendly microbes.||Manure increases the number of friendly microbes.|
|Fertilizers does not increase the texture of soil||The texture of soil is increased by the use of manure|
|Fertilizers does not increase the water holding capacity of soil||Manure increases the water holding capacity of soil|
|Fertilizers does not make the soil porous||Manure makes the soil Porous|
Q6. What is irrigation? Describe two methods of irrigation which conserve water
Answer : Irrigation
Irrigation : Irrigation is defined as the process of watering the crop for proper growth of the plants. This supply of water to the crop is given at some intervals. These intervals are different for the different crops. There are various methods for the irrigation . Some of the irrigation methods are given below :
• Drip Irrigation Method
• Sprinkler System
• Irrigation by lateral move
• Surface irrigation
• Tube well
• Center Pivot Irrigation
Q7. If wheat is sown in the kharif season, what would happen? Discuss
Wheat is a rabi crop . It is sown and grown in winter season. The Kharif season is not suitable for its growth. The crop production may decrease, or the crop may be destroyed due to excess heat (temperature).
Note : Due to the advancement in the technologies, now it is possible that rabi crops can be grown in kharif season but only via a new technology known as green house . It is a costlier process. So, farmers generally do not adopt the green house technologies for crops.
Q8. Explain how soil gets affected by the continuous plantation of crops in a field.
The Continuous plantation of the crops in a field make the soil infertile and the quantity of nutrients starts decreasing . The soil needs some time replenish its nutrients .
Q9. What are weeds? How can we control them?
Weeds : Weeds are defined as the unwanted plants that grow along with the main crop. The methods to control weeds are given below
Methods to Control Weed :-
• Manual Removal
Q10. Arrange the following boxes in proper order to make a flow chart of sugarcane crop production
Q11. Complete the following word puzzle with the help of clues given below
1. Providing water to the crops.
2. Keeping crop grains for a long time under proper conditions.
5. Certain plants of the same kind grown on a large scale.
3. A machine used for cutting the matured crop.
4. A rabi crop that is also one of the pulses
6. A process of separating the grain from chaff.
1. Providing water to the crops. : Answer : IRRIGATION
2. Keeping crop grains for a long time under proper conditions. : Answer : STORAGE
5. Certain plants of the same kind grown on a large scale. : Answer : CROP
3. A machine used for cutting the matured crop. Answer : HARVESTER
4. A rabi crop that is also one of the pulses. Answer : GRAM
6. A process of separating the grain from chaff. : Answer : WINNOWING