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NCERT Class VIII Science Solutions: Chapter 1 - Crop Production and Management Part 3
Question 14:
State whether the following statements are True or False. Correct the false statements.
- Using good quality seed is the only criterion to get high yield.
- Growing different crops in different seasons in the same field will deplete the soil of nutrients.
- All crop plants are sown as seeds in the field.
- Cells of root nodules of leguminous plants fix nitrogen.
- Freshly harvested grains must be dried before storing.
Answer:
- Using good quality seed is the only criterion to get high yield. (False)
Hint: Apart from good quality seeds, using appropriate agricultural practices are important for getting higher yield.
- Growing different crops in different seasons in the same field will deplete the soil of nutrients. (False)
Hint: It actually enriches the soil
- All crop plants are sown as seeds in the field. (False)
Hint: Some crop plants need transplantation.
- Cells of root nodules of leguminous plants fix nitrogen. (False)
Hint: Rhizobium (bacteria) present in the cells of root nodules of leguminous, plants fix nitrogen.
- Freshly harvested grains must be dried before storing. (True)
Question 15:
During which months do farmers grow mustard in India?
Answer:
October to March
Question 16:
Which activity of the farmer can promote growth of earthworms and microbes in the field?
Answer:
Loosening the soil/maintaining high moisture levels in soil
SHORT ANSWER QUESTIONS
Question 17:
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?
Answer:
Kharif: Rice or Soyabean, Rabi: Pea or Wheat.
Pea/Soyabean is legumes that will fix nitrogen with the help of Rhizobium.
Question 18:
Match the agricultural implements given in Column A with their use given in Column B.
Column A | Column B |
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Answer:
Column A | Column B |
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| iii Sowing |
| i Irrigation |
| ii Harvesting |
| iv Ploughing |