NCERT Class VIII Science Solutions: Chapter 1-Crop Production and Management Part 3

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Question 14:

State whether the following statements are True or False. Correct the false statements.

  1. Using good quality seed is the only criterion to get high yield.

  2. Growing different crops in different seasons in the same field will deplete the soil of nutrients.

  3. All crop plants are sown as seeds in the field.

  4. Cells of root nodules of leguminous plants fix nitrogen.

  5. Freshly harvested grains must be dried before storing.

Answer:

  1. 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.

  2. Growing different crops in different seasons in the same field will deplete the soil of nutrients. (False)

    Hint: It actually enriches the soil

  3. All crop plants are sown as seeds in the field. (False)

    Hint: Some crop plants need transplantation.

  4. 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.

  5. 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

Image of function of soil microbes

Function of Soil Microbes

Image of function of soil microbes

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.

Match the Column a and Column B. (Q)
Match the Column A and Column B. (Q)

Column A

Column B

Sickle

Irrigation

Hoe

Harvesting

Seed Drill

Sowing

Sprinkler

Ploughing

Answer:

Match the Column a and Column B. (A)
Match the Column A and Column B. (A)

Column A

Column B

Sickle

iii Sowing

Hoe

i Irrigation

Seed Drill

ii Harvesting

Sprinkler

iv Ploughing

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