can anyone send a photo copy of extra question for science and maths for class 8 ?? the best answer will be marked as brainalist
Answers
Question 1.
What is the name of the undesirable plants that grow among the crops?
Answer:
Weeds
Question 2.
Name one weed.
Answer:
Wild oat
Question 3.
Name the methods applied for weeding.
Answer:
Manual method
Chemical method
Biological method
Question 4.
Name the chemicals that are used to remove weeds.
Answer:
Weedicides
Question 5.
Name a tool which is used for removing weeds and for loosening soil.
Answer:
Hoe
Question 6.
What is the process of loosening and turning of the soil called?
Answer:
Tilling or ploughing
Question 7.
What are the substances which are added to the soil in the form of nutrients called?
Answer:
Manure and fertilisers
Question 8.
What is the process of supplying water to crops at different intervals is called?
Answer:
Irrigation
Question 9.
What are the sources of irrigation?
Answer:
Wells, tubewells, ponds, lakes, etc.
Question 10.
What is the process of separation of grain from chaff called?
Answer:
Winnowing
Question 11.
Name two crops belonging to rabi crop.
Answer:
Pea, gram
Question 12.
Name the ideal months for the harvesting of rabi crops.
Answer:
March/April
Question 13.
Name two kharif crops.
Answer:
Soybean, groundnut
Question 14.
Name the ideal months for sowing kharif crops.
Answer:
June/July
Question 15.
Name any two fertilisers.
Answer:
NPK, Diammonium phosphate
Crop Production and Management Class 8 Extra Questions Short Answer Questions
Question 1.
What is a crop?
Answer:
Crop is the term used to describe a plant that is grown in a field on a large scale. For example, cereal crops, wheat crops.
Question 2.
What do you mean by produce?
Answer:
The products obtained from the crops are called produce.
Question 3.
What do you mean by the term agricultural practice?
Answer:
Agricultural practices are those practices which involve the necessary steps to be taken during production of crops.
Question 4.
Explain the term levelling.
Answer:
Levelling is the process of breaking down the larger lumps of soil, and then levelling them by using a leveller.
Question 5.
What are the advantages of levelling?
Answer:
Following are the advantages of levelling:
Levelling helps to prevent soil erosion caused by wind or air.
It helps in sowing the seeds uniformly, and thus helps the plants to grow uniformly too.
It helps in proper irrigation by allowing the water to get distributed uniformly throughout the soil.
Question 6.
What is a plough?
Answer:
A plough is an equipment for ploughing. It is mainly made of a wooden shaft called a plough-shaft, at-tached to a triangular iron blade called ploughshare.
Question 7.
What is a cultivator?
Answer:
Cultivator is a farm implement used for stirring and pulverizing the soil for planting crops.
Question 8.
Explain the term transplantation.
Answer:
Some of the crops are first grown in the nurseries and then transferred to the main field. This process is known as transplantation.
Question 9.
What are the advantages of manure?
Answer:
Following are some advantages of manure:
It enhances water-holding capacity of soil.
It improves soil quality.
It promotes the growth of soil friendly microbes.
It is renewable, biodegradable and eco-friendly.
Question 10.
What are weedicides? Give some examples.
Answer:
Weedicides are the chemicals that are used to remove weeds. Some commonly used weedicides are 2, 4-D and metachlor.